Multiple Choice Questions (MCQs) for JEE Physics: Laws Of Motion
Review structured MCQ sets for JEE Physics Laws Of Motion. Built according to official JEE guidelines, these downloadable questions support daily revision and core concept reinforcement.
Practice Laws Of Motion MCQs for JEE Physics
View or download the dedicated Laws Of Motion MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Physics evaluations.
Multiple Choice Questions
(a) To increase the speed
(b) To decrease the speed
(c) To maintain the same speed
(d) To change the direction
Show Answer & Explanation
Answer: (c) To maintain the same speed
Explanation:
1. By Newton's first law a body in uniform motion continues so unless a net force acts.
2. Force is needed only to change the speed or the direction, not to maintain the same speed.
Teacher's Note:
1. F
2. o
3. r
4. c
5. e
6.
7. c
8. h
9. a
10. n
11. g
12. e
13. s
14.
15. v
16. e
17. l
18. o
19. c
20. i
21. t
22. y
23. ,
24.
25. i
26. t
27.
28. d
29. o
30. e
31. s
32.
33. n
34. o
35. t
36.
37. s
38. u
39. s
40. t
41. a
42. i
43. n
44.
45. i
46. t
47. .
48.
49. C
50. o
51. n
52. s
53. t
54. a
55. n
56. t
57.
58. v
59. e
60. l
61. o
62. c
63. i
64. t
65. y
66.
67. m
68. e
69. a
70. n
71. s
72.
73. z
74. e
75. r
76. o
77.
78. n
79. e
80. t
81.
82. f
83. o
84. r
85. c
86. e
87. .
(a) \( 5\times60\ \text{N} \)
(b) \( \frac{5}{60}\times981\ \text{N} \)
(c) \( 60^2\times5^2\ \text{N} \)
(d) \( \frac52\times60^2\times981\ \text{N} \)
Show Answer & Explanation
Answer: (a) \( 5\times60\ \text{N} \)
Explanation:
1. Acceleration \( a=\frac{60-0}{1}=60\ \text{m/s}^2 \).
2. Force \( F=ma=5\times60=300\ \text{N} \), which is option (a).
Teacher's Note:
1. U
2. s
3. e
4.
5. F
6.
7. =
8.
9. m
10. a
11.
12. w
13. i
14. t
15. h
16.
17. t
18. h
19. e
20.
21. a
22. c
23. c
24. e
25. l
26. e
27. r
28. a
29. t
30. i
31. o
32. n
33.
34. f
35. o
36. u
37. n
38. d
39.
40. f
41. r
42. o
43. m
44.
45. c
46. h
47. a
48. n
49. g
50. e
51.
52. i
53. n
54.
55. v
56. e
57. l
58. o
59. c
60. i
61. t
62. y
63.
64. o
65. v
66. e
67. r
68.
69. t
70. i
71. m
72. e
73. .
74.
75. D
76. o
77.
78. n
79. o
80. t
81.
82. m
83. i
84. x
85.
86. i
87. n
88.
89. 9
90. 8
91. 1
92. ,
93.
94. w
95. h
96. i
97. c
98. h
99.
100. b
101. e
102. l
103. o
104. n
105. g
106. s
107.
108. t
109. o
110.
111. C
112. G
113. S
114.
115. u
116. n
117. i
118. t
119. s
120. .
(a) Zero
(b) 39200
(c) 160
(d) 80
Show Answer & Explanation
Answer: (a) Zero
Explanation:
1. Velocity is constant, so acceleration is zero.
2. Net force = ma = 0. The table is frictionless, so no horizontal force is needed.
Teacher's Note:
1. C
2. o
3. n
4. s
5. t
6. a
7. n
8. t
9.
10. v
11. e
12. l
13. o
14. c
15. i
16. t
17. y
18.
19. a
20. l
21. w
22. a
23. y
24. s
25.
26. m
27. e
28. a
29. n
30. s
31.
32. z
33. e
34. r
35. o
36.
37. n
38. e
39. t
40.
41. f
42. o
43. r
44. c
45. e
46. .
47.
48. T
49. h
50. e
51.
52. n
53. u
54. m
55. b
56. e
57. r
58. s
59.
60. g
61. i
62. v
63. e
64. n
65.
66. a
67. r
68. e
69.
70. d
71. i
72. s
73. t
74. r
75. a
76. c
77. t
78. o
79. r
80. s
81. .
(a) 8 N
(b) 4 N
(c) Zero
(d) 2 N
Show Answer & Explanation
Answer: (b) 4 N
Explanation:
1. Deceleration due to friction \( a=\frac{4}{2}=2\ \text{m/s}^2 \).
2. Friction force \( f=ma=2\times2=4\ \text{N} \).
3. To maintain constant velocity the applied force must balance friction, so F = 4 N.
Teacher's Note:
1. A
2. t
3.
4. c
5. o
6. n
7. s
8. t
9. a
10. n
11. t
12.
13. v
14. e
15. l
16. o
17. c
18. i
19. t
20. y
21.
22. t
23. h
24. e
25.
26. a
27. p
28. p
29. l
30. i
31. e
32. d
33.
34. f
35. o
36. r
37. c
38. e
39.
40. e
41. q
42. u
43. a
44. l
45. s
46.
47. t
48. h
49. e
50.
51. o
52. p
53. p
54. o
55. s
56. i
57. n
58. g
59.
60. f
61. r
62. i
63. c
64. t
65. i
66. o
67. n
68. .
69.
70. F
71. i
72. n
73. d
74.
75. f
76. r
77. i
78. c
79. t
80. i
81. o
82. n
83.
84. f
85. r
86. o
87. m
88.
89. t
90. h
91. e
92.
93. s
94. t
95. o
96. p
97. p
98. i
99. n
100. g
101.
102. m
103. o
104. t
105. i
106. o
107. n
108. .
(a) 4.2 m/s²
(b) 3.6 m/s²
(c) 2.4 m/s²
(d) 1.6 m/s²
Show Answer & Explanation
Answer: (d) 1.6 m/s²
Explanation:
1. Force \( F=4\times2=8\ \text{N} \).
2. Acceleration of the 5 kg body \( a=\frac{8}{5}=1.6\ \text{m/s}^2 \).
Teacher's Note:
1. F
2. o
3. r
4.
5. t
6. h
7. e
8.
9. s
10. a
11. m
12. e
13.
14. f
15. o
16. r
17. c
18. e
19. ,
20.
21. a
22. c
23. c
24. e
25. l
26. e
27. r
28. a
29. t
30. i
31. o
32. n
33.
34. i
35. s
36.
37. i
38. n
39. v
40. e
41. r
42. s
43. e
44. l
45. y
46.
47. p
48. r
49. o
50. p
51. o
52. r
53. t
54. i
55. o
56. n
57. a
58. l
59.
60. t
61. o
62.
63. m
64. a
65. s
66. s
67. .
68.
69. T
70. h
71. e
72.
73. h
74. e
75. a
76. v
77. i
78. e
79. r
80.
81. b
82. o
83. d
84. y
85.
86. m
87. u
88. s
89. t
90.
91. a
92. c
93. c
94. e
95. l
96. e
97. r
98. a
99. t
100. e
101.
102. l
103. e
104. s
105. s
106. .
(a) 3 m/s²
(b) −3 m/s²
(c) 0.3 m/s²
(d) −0.3 m/s²
Show Answer & Explanation
Answer: (b) −3 m/s²
Explanation:
1. Take the initial direction as positive: \( u=10,\ v=-2 \).
2. Acceleration \( a=\frac{v-u}{t}=\frac{-2-10}{4}=-3\ \text{m/s}^2 \).
Teacher's Note:
1. R
2. e
3. v
4. e
5. r
6. s
7. a
8. l
9.
10. o
11. f
12.
13. d
14. i
15. r
16. e
17. c
18. t
19. i
20. o
21. n
22.
23. m
24. e
25. a
26. n
27. s
28.
29. t
30. h
31. e
32.
33. f
34. i
35. n
36. a
37. l
38.
39. v
40. e
41. l
42. o
43. c
44. i
45. t
46. y
47.
48. i
49. s
50.
51. n
52. e
53. g
54. a
55. t
56. i
57. v
58. e
59. .
60.
61. T
62. h
63. e
64.
65. s
66. i
67. g
68. n
69.
70. o
71. f
72.
73. a
74. c
75. c
76. e
77. l
78. e
79. r
80. a
81. t
82. i
83. o
84. n
85.
86. s
87. h
88. o
89. w
90. s
91.
92. i
93. t
94.
95. o
96. p
97. p
98. o
99. s
100. e
101. s
102.
103. t
104. h
105. e
106.
107. i
108. n
109. i
110. t
111. i
112. a
113. l
114.
115. m
116. o
117. t
118. i
119. o
120. n
121. .
(a) \( \sqrt{m} \)
(b) \( m^0 \)
(c) \( \frac{1}{\sqrt m} \)
(d) \( m \)
Show Answer & Explanation
Answer: (c) \( \frac{1}{\sqrt m} \)
Explanation:
1. Work-energy theorem: \( Fd=\frac12mv^2 \).
2. So \( v=\sqrt{\frac{2Fd}{m}}\propto\frac{1}{\sqrt m} \).
Teacher's Note:
1. W
2. i
3. t
4. h
5.
6. F
7.
8. a
9. n
10. d
11.
12. d
13.
14. f
15. i
16. x
17. e
18. d
19. ,
20.
21. k
22. i
23. n
24. e
25. t
26. i
27. c
28.
29. e
30. n
31. e
32. r
33. g
34. y
35.
36. i
37. s
38.
39. f
40. i
41. x
42. e
43. d
44. ,
45.
46. s
47. o
48.
49. h
50. e
51. a
52. v
53. i
54. e
55. r
56.
57. b
58. o
59. d
60. i
61. e
62. s
63.
64. r
65. e
66. a
67. c
68. h
69.
70. l
71. o
72. w
73. e
74. r
75.
76. s
77. p
78. e
79. e
80. d
81. .
82.
83. S
84. p
85. e
86. e
87. d
88.
89. v
90. a
91. r
92. i
93. e
94. s
95.
96. a
97. s
98.
99. t
100. h
101. e
102.
103. i
104. n
105. v
106. e
107. r
108. s
109. e
110.
111. s
112. q
113. u
114. a
115. r
116. e
117.
118. r
119. o
120. o
121. t
122.
123. o
124. f
125.
126. m
127. a
128. s
129. s
130. .
(a) 3.0 m/s
(b) 1.5 m/s
(c) 0.1 m/s
(d) 2 m/s
Show Answer & Explanation
Answer: (c) 0.1 m/s
Explanation:
1. Work done \( =5\times10^4\times3=1.5\times10^5\ \text{J} \).
2. Equate to kinetic energy: \( \frac12(3\times10^7)v^2=1.5\times10^5 \).
3. So \( v^2=0.01 \) and v = 0.1 m/s.
Teacher's Note:
1. U
2. s
3. e
4.
5. t
6. h
7. e
8.
9. w
10. o
11. r
12. k
13. -
14. e
15. n
16. e
17. r
18. g
19. y
20.
21. t
22. h
23. e
24. o
25. r
26. e
27. m
28.
29. i
30. n
31. s
32. t
33. e
34. a
35. d
36.
37. o
38. f
39.
40. f
41. i
42. n
43. d
44. i
45. n
46. g
47.
48. t
49. i
50. m
51. e
52. .
53.
54. B
55. e
56.
57. c
58. a
59. r
60. e
61. f
62. u
63. l
64.
65. w
66. i
67. t
68. h
69.
70. p
71. o
72. w
73. e
74. r
75. s
76.
77. o
78. f
79.
80. t
81. e
82. n
83. .
(a) \( \frac{M}{2} \)
(b) \( \frac{M}{4} \)
(c) \( 4M \)
(d) \( 2M \)
Show Answer & Explanation
Answer: (a) \( \frac{M}{2} \)
Explanation:
1. Let the upthrust be B. While descending: \( Mg-B=M\frac g3 \), so \( B=\frac{2Mg}{3} \).
2. After releasing m, mass is M − m and it rises: \( B-(M-m)g=(M-m)\frac g3 \).
3. So \( \frac{2M}{3}=\frac43(M-m) \), giving \( M-m=\frac M2 \) and \( m=\frac M2 \).
Teacher's Note:
1. T
2. h
3. e
4.
5. u
6. p
7. t
8. h
9. r
10. u
11. s
12. t
13.
14. s
15. t
16. a
17. y
18. s
19.
20. t
21. h
22. e
23.
24. s
25. a
26. m
27. e
28.
29. b
30. e
31. c
32. a
33. u
34. s
35. e
36.
37. t
38. h
39. e
40.
41. v
42. o
43. l
44. u
45. m
46. e
47.
48. i
49. s
50.
51. u
52. n
53. c
54. h
55. a
56. n
57. g
58. e
59. d
60. .
61.
62. W
63. r
64. i
65. t
66. e
67.
68. N
69. e
70. w
71. t
72. o
73. n
74. '
75. s
76.
77. s
78. e
79. c
80. o
81. n
82. d
83.
84. l
85. a
86. w
87.
88. f
89. o
90. r
91.
92. b
93. o
94. t
95. h
96.
97. s
98. i
99. t
100. u
101. a
102. t
103. i
104. o
105. n
106. s
107.
108. a
109. n
110. d
111.
112. e
113. l
114. i
115. m
116. i
117. n
118. a
119. t
120. e
121.
122. B
123. .
(a) 1 N
(b) 2 N
(c) 4 N
(d) 0.5 N
Show Answer & Explanation
Answer: (a) 1 N
Explanation:
1. Extra force equals rate of change of momentum of the gravel: \( F=v\frac{dm}{dt} \).
2. F = 2 × 0.5 = 1 N.
Teacher's Note:
1. M
2. a
3. s
4. s
5.
6. i
7. s
8.
9. b
10. e
11. i
12. n
13. g
14.
15. a
16. d
17. d
18. e
19. d
20.
21. t
22. o
23.
24. t
25. h
26. e
27.
28. m
29. o
30. v
31. i
32. n
33. g
34.
35. s
36. y
37. s
38. t
39. e
40. m
41.
42. a
43. t
44.
45. c
46. o
47. n
48. s
49. t
50. a
51. n
52. t
53.
54. s
55. p
56. e
57. e
58. d
59. ,
60.
61. s
62. o
63.
64. F
65.
66. =
67.
68. v
69.
70. d
71. m
72. /
73. d
74. t
75. .
76.
77. T
78. h
79. e
80.
81. b
82. e
83. l
84. t
85.
86. s
87. p
88. e
89. e
90. d
91.
92. i
93. s
94.
95. k
96. e
97. p
98. t
99.
100. f
101. i
102. x
103. e
104. d
105. ,
106.
107. h
108. e
109. n
110. c
111. e
112.
113. n
114. o
115.
116. a
117. c
118. c
119. e
120. l
121. e
122. r
123. a
124. t
125. i
126. o
127. n
128.
129. t
130. e
131. r
132. m
133. .
(a) 2.5 m/s²
(b) 5 m/s²
(c) 10 m/s²
(d) 15 m/s²
Show Answer & Explanation
Answer: (a) 2.5 m/s²
Explanation:
1. Force by the jet (water stops on striking) \( F=v\frac{dm}{dt}=5\times1=5\ \text{N} \).
2. Acceleration \( a=\frac{5}{2}=2.5\ \text{m/s}^2 \).
Teacher's Note:
1. A
2.
3. j
4. e
5. t
6.
7. t
8. h
9. a
10. t
11.
12. l
13. o
14. s
15. e
16. s
17.
18. a
19. l
20. l
21.
22. i
23. t
24. s
25.
26. m
27. o
28. m
29. e
30. n
31. t
32. u
33. m
34.
35. o
36. n
37.
38. t
39. h
40. e
41.
42. b
43. l
44. o
45. c
46. k
47.
48. e
49. x
50. e
51. r
52. t
53. s
54.
55. F
56.
57. =
58.
59. v
60.
61. d
62. m
63. /
64. d
65. t
66. .
67.
68. D
69. i
70. v
71. i
72. d
73. e
74.
75. b
76. y
77.
78. t
79. h
80. e
81.
82. b
83. l
84. o
85. c
86. k
87. '
88. s
89.
90. m
91. a
92. s
93. s
94.
95. f
96. o
97. r
98.
99. t
100. h
101. e
102.
103. a
104. c
105. c
106. e
107. l
108. e
109. r
110. a
111. t
112. i
113. o
114. n
115. .
(a) 100 N
(b) 10 N
(c) 1 N
(d) 0.1 N
Show Answer & Explanation
Answer: (b) 10 N
Explanation:
1. Mass = 0.01 kg. Change in momentum \( =0.01\times5-(0.01\times(-5))=0.1\ \text{kg m/s} \).
2. Average force \( =\frac{0.1}{0.01}=10\ \text{N} \).
Teacher's Note:
1. R
2. e
3. b
4. o
5. u
6. n
7. d
8.
9. a
10. t
11.
12. e
13. q
14. u
15. a
16. l
17.
18. s
19. p
20. e
21. e
22. d
23.
24. d
25. o
26. u
27. b
28. l
29. e
30. s
31.
32. t
33. h
34. e
35.
36. m
37. o
38. m
39. e
40. n
41. t
42. u
43. m
44.
45. c
46. h
47. a
48. n
49. g
50. e
51. :
52.
53. Δ
54. p
55.
56. =
57.
58. 2
59. m
60. v
61. .
62.
63. C
64. o
65. n
66. v
67. e
68. r
69. t
70.
71. g
72. r
73. a
74. m
75. s
76.
77. t
78. o
79.
80. k
81. i
82. l
83. o
84. g
85. r
86. a
87. m
88. s
89.
90. f
91. i
92. r
93. s
94. t
95. .
(a) 8 N
(b) 4 N
(c) 2 N
(d) 0
Show Answer & Explanation
Answer: (a) 8 N
Explanation:
1. Change in momentum \( =0.2\times20=4\ \text{kg m/s} \).
2. Force \( =\frac{4}{0.5}=8\ \text{N} \).
Teacher's Note:
1. T
2. h
3. e
4.
5. b
6. a
7. l
8. l
9.
10. i
11. s
12.
13. b
14. r
15. o
16. u
17. g
18. h
19. t
20.
21. t
22. o
23.
24. r
25. e
26. s
27. t
28. ,
29.
30. s
31. o
32.
33. Δ
34. p
35.
36. =
37.
38. m
39. v
40. .
41.
42. A
43.
44. l
45. o
46. n
47. g
48. e
49. r
50.
51. c
52. a
53. t
54. c
55. h
56. i
57. n
58. g
59.
60. t
61. i
62. m
63. e
64.
65. r
66. e
67. d
68. u
69. c
70. e
71. s
72.
73. t
74. h
75. e
76.
77. f
78. o
79. r
80. c
81. e
82. ,
83.
84. w
85. h
86. i
87. c
88. h
89.
90. i
91. s
92.
93. w
94. h
95. y
96.
97. p
98. l
99. a
100. y
101. e
102. r
103. s
104.
105. d
106. r
107. a
108. w
109.
110. t
111. h
112. e
113.
114. h
115. a
116. n
117. d
118.
119. b
120. a
121. c
122. k
123. .
(a) 3000 m/s²
(b) 2000 m/s²
(c) 1000 m/s²
(d) 500 m/s²
Show Answer & Explanation
Answer: (a) 3000 m/s²
Explanation:
1. Speed just before impact \( =\sqrt{2\times10\times20}=20\ \text{m/s} \) downward.
2. Speed just after impact \( =\sqrt{2\times10\times5}=10\ \text{m/s} \) upward.
3. Change in velocity = 10 − (−20) = 30 m/s, so \( a=\frac{30}{0.01}=3000\ \text{m/s}^2 \).
Teacher's Note:
1. T
2. r
3. e
4. a
5. t
6.
7. t
8. h
9. e
10.
11. t
12. w
13. o
14.
15. v
16. e
17. l
18. o
19. c
20. i
21. t
22. i
23. e
24. s
25.
26. w
27. i
28. t
29. h
30.
31. o
32. p
33. p
34. o
35. s
36. i
37. t
38. e
39.
40. s
41. i
42. g
43. n
44. s
45. .
46.
47. T
48. h
49. e
50.
51. c
52. h
53. a
54. n
55. g
56. e
57.
58. i
59. n
60.
61. v
62. e
63. l
64. o
65. c
66. i
67. t
68. y
69.
70. i
71. s
72.
73. t
74. h
75. e
76.
77. s
78. u
79. m
80.
81. o
82. f
83.
84. t
85. h
86. e
87.
88. t
89. w
90. o
91.
92. s
93. p
94. e
95. e
96. d
97. s
98. .
(a) 25 N
(b) 50 N
(c) 12.5 N
(d) 100 N
Show Answer & Explanation
Answer: (b) 50 N
Explanation:
1. Slope of the graph gives acceleration: \( a=\frac{2}{2}=1\ \text{m/s}^2 \).
2. F = ma = 50 × 1 = 50 N.
Teacher's Note:
1. T
2. h
3. e
4.
5. s
6. l
7. o
8. p
9. e
10.
11. o
12. f
13.
14. a
15.
16. v
17. -
18. t
19.
20. g
21. r
22. a
23. p
24. h
25.
26. i
27. s
28.
29. a
30. c
31. c
32. e
33. l
34. e
35. r
36. a
37. t
38. i
39. o
40. n
41. .
42.
43. A
44.
45. s
46. t
47. r
48. a
49. i
50. g
51. h
52. t
53.
54. l
55. i
56. n
57. e
58.
59. m
60. e
61. a
62. n
63. s
64.
65. c
66. o
67. n
68. s
69. t
70. a
71. n
72. t
73.
74. f
75. o
76. r
77. c
78. e
79. .
(a) 0.098 m/s
(b) 0.98 m/s
(c) 9.8 m/s
(d) 98.0 m/s
Show Answer & Explanation
Answer: (c) 9.8 m/s
Explanation:
1. Each bullet changes momentum by \( 2mv \), and 10 bullets strike per second.
2. Force \( =10\times2\times0.05\times v=v \) newton.
3. For floating, force = weight = 1.0 × 9.8 N, so v = 9.8 m/s.
Teacher's Note:
1. B
2. a
3. l
4. a
5. n
6. c
7. e
8.
9. t
10. h
11. e
12.
13. a
14. v
15. e
16. r
17. a
18. g
19. e
20.
21. f
22. o
23. r
24. c
25. e
26.
27. f
28. r
29. o
30. m
31.
32. t
33. h
34. e
35.
36. b
37. u
38. l
39. l
40. e
41. t
42. s
43.
44. a
45. g
46. a
47. i
48. n
49. s
50. t
51.
52. t
53. h
54. e
55.
56. d
57. i
58. s
59. c
60. '
61. s
62.
63. w
64. e
65. i
66. g
67. h
68. t
69. .
70.
71. R
72. e
73. b
74. o
75. u
76. n
77. d
78.
79. d
80. o
81. u
82. b
83. l
84. e
85. s
86.
87. t
88. h
89. e
90.
91. m
92. o
93. m
94. e
95. n
96. t
97. u
98. m
99.
100. t
101. r
102. a
103. n
104. s
105. f
106. e
107. r
108.
109. p
110. e
111. r
112.
113. b
114. u
115. l
116. l
117. e
118. t
119. .
(a) \( -\frac{2\alpha v^2}{M} \)
(b) \( -\frac{3\alpha v^2}{M} \)
(c) \( -\frac{\alpha v^2}{M} \)
(d) \( -\alpha v^2 \)
Show Answer & Explanation
Answer: (c) \( -\frac{\alpha v^2}{M} \)
Explanation:
1. No external force, so momentum is conserved: \( \frac{d(Mv)}{dt}=0 \).
2. So \( M\frac{dv}{dt}+v\frac{dM}{dt}=0 \).
3. Hence \( a=-\frac{v}{M}\cdot\alpha v=-\frac{\alpha v^2}{M} \).
Teacher's Note:
1. C
2. o
3. l
4. l
5. e
6. c
7. t
8. i
9. n
10. g
11.
12. s
13. t
14. a
15. t
16. i
17. o
18. n
19. a
20. r
21. y
22.
23. d
24. u
25. s
26. t
27.
28. s
29. l
30. o
31. w
32. s
33.
34. t
35. h
36. e
37.
38. s
39. a
40. t
41. e
42. l
43. l
44. i
45. t
46. e
47. .
48.
49. A
50. p
51. p
52. l
53. y
54.
55. c
56. o
57. n
58. s
59. e
60. r
61. v
62. a
63. t
64. i
65. o
66. n
67.
68. o
69. f
70.
71. m
72. o
73. m
74. e
75. n
76. t
77. u
78. m
79.
80. t
81. o
82.
83. t
84. h
85. e
86.
87. c
88. h
89. a
90. n
91. g
92. i
93. n
94. g
95.
96. m
97. a
98. s
99. s
100. .
(a) \( 500t-50t^2 \)
(b) \( 50t-10 \)
(c) \( 50-t^2 \)
(d) \( 100t^2 \)
Show Answer & Explanation
Answer: (a) \( 500t-50t^2 \)
Explanation:
1. Impulse \( =\int_0^t F\,dt=\int_0^t(500-100t)\,dt \).
2. This equals \( 500t-50t^2 \).
Teacher's Note:
1. I
2. m
3. p
4. u
5. l
6. s
7. e
8.
9. i
10. s
11.
12. t
13. h
14. e
15.
16. t
17. i
18. m
19. e
20.
21. i
22. n
23. t
24. e
25. g
26. r
27. a
28. l
29.
30. o
31. f
32.
33. f
34. o
35. r
36. c
37. e
38. .
39.
40. I
41. n
42. t
43. e
44. g
45. r
46. a
47. t
48. e
49.
50. t
51. e
52. r
53. m
54.
55. b
56. y
57.
58. t
59. e
60. r
61. m
62.
63. w
64. i
65. t
66. h
67.
68. t
69. h
70. e
71.
72. l
73. i
74. m
75. i
76. t
77. s
78.
79. 0
80.
81. t
82. o
83.
84. t
85. .
(a) 12.25 kg/s
(b) 17.5 kg/s
(c) 7.35 kg/s
(d) 5.2 kg/s
Show Answer & Explanation
Answer: (c) 7.35 kg/s
Explanation:
1. Thrust \( u\left|\frac{dm}{dt}\right|=M(g+a) \).
2. Thrust = 1000 × (9.8 + 4.9) = 14700 N.
3. Rate \( =\frac{14700}{2000}=7.35\ \text{kg/s} \).
Teacher's Note:
1. T
2. h
3. r
4. u
5. s
6. t
7.
8. m
9. u
10. s
11. t
12.
13. o
14. v
15. e
16. r
17. c
18. o
19. m
20. e
21.
22. w
23. e
24. i
25. g
26. h
27. t
28.
29. a
30. n
31. d
32.
33. a
34. l
35. s
36. o
37.
38. s
39. u
40. p
41. p
42. l
43. y
44.
45. t
46. h
47. e
48.
49. a
50. c
51. c
52. e
53. l
54. e
55. r
56. a
57. t
58. i
59. o
60. n
61. .
62.
63. U
64. s
65. e
66.
67. t
68. h
69. e
70.
71. e
72. x
73. h
74. a
75. u
76. s
77. t
78.
79. s
80. p
81. e
82. e
83. d
84.
85. r
86. e
87. l
88. a
89. t
90. i
91. v
92. e
93.
94. t
95. o
96.
97. t
98. h
99. e
100.
101. r
102. o
103. c
104. k
105. e
106. t
107. .
(a) 0.7 kg/s
(b) 1.4 kg/s
(c) 2.7 kg/s
(d) 10.7 kg/s
Show Answer & Explanation
Answer: (a) 0.7 kg/s
Explanation:
1. Thrust \( =u\frac{dm}{dt} \).
2. Rate \( =\frac{210}{300}=0.7\ \text{kg/s} \).
Teacher's Note:
1. T
2. h
3. r
4. u
5. s
6. t
7.
8. e
9. q
10. u
11. a
12. l
13. s
14.
15. e
16. x
17. h
18. a
19. u
20. s
21. t
22.
23. s
24. p
25. e
26. e
27. d
28.
29. t
30. i
31. m
32. e
33. s
34.
35. t
36. h
37. e
38.
39. m
40. a
41. s
42. s
43.
44. e
45. j
46. e
47. c
48. t
49. e
50. d
51.
52. p
53. e
54. r
55.
56. s
57. e
58. c
59. o
60. n
61. d
62. .
Free study material for Physics
Laws Of Motion Objective Questions & Solutions for JEE Physics
Chapter MCQs with Answers for JEE Physics
Review structured objective questions for JEE Physics Laws Of Motion. Built according to official JEE guidelines, these MCQ sets support daily revision and core concept reinforcement.
Expert Practice Material for JEE Physics
Cross-reference your completed choices with comprehensive NCERT solutions for JEE Physics to ensure absolute clarity across all sub-topics in this chapter.
Complete Your Chapter Revision
Explore our broader library of printable assignments, chapter notes, and mock tests designed to support continuous revision and secure higher marks in JEE assessments.
FAQs
You can get most exhaustive JEE Physics Laws Of Motion MCQs Set 04 for free on StudiesToday.com. These MCQs for JEE Physics are updated for the 2026-27 academic session as per JEE examination standards.
Yes, our JEE Physics Laws Of Motion MCQs Set 04 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the JEE paper is now competency-based.
By solving our JEE Physics Laws Of Motion MCQs Set 04, JEE students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Physics.
Yes, Physics MCQs for JEE have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused JEE exams.
Yes, you can also access online interactive tests for JEE Physics Laws Of Motion MCQs Set 04 on StudiesToday.com as they provide instant answers and score to help you track your progress in Physics.