CBSE Class 9 Science Motion MCQs Set A

Question: From the given v-t graph (figure) it can be inferred that the object is moving with

(a) uniform velocity
(b) non uniform velocity
(c) At rest
(d) moving with uniform acceleration

Answer: A

Question: What does the slope of distance - time graph give?

(a) acceleration
(b) both[a] and [c] depending upon the time of graph
(c) Speed
(d) uniform speed

Answer: A

Question: In the total journey the body has travelled up to a distance of

(a) 900m
(b) 800m
(c) 1000m
(d) 270m

Answer: D

Question: The velocity of the body at the point B is

(a) 40m/s
(b) 20m/s
(c) 36m/s
(d) 50m/s

Answer: C

Question: At the point A the body is at a distance of

(a) 180m
(b) 200m
(c) 300m
(d) 50m

Answer: A

Question: Distance covered by the body during the interval from 10sec to 20 sec is

(a) 270m
(b) 200m
(c) 360m
(d) 400m

Answer: A

Question: From the figure the body is moving with

(a) Zero Acceleration
(b) Zero velocity
(c) Variable Acceleration
(d) Constant Acceleration

Answer: D

Question: Distance covered by a body from velocity-time graph is
(a) Area under the graph
(b) Equal to the slope of the graph
(c) Is denoted by a line parallel to the time axis at any point on the distance axis
(d) Is denoted by a line parallel to the distance axis at any point on the time axis

Answer: A

Question: The acceleration of a body from a velocity - time graph is
(a) Area under the graph
(b) Equal to the slope of the graph
(c) Is denoted by a line parallel to the time axis at any point on the distance axis
(d) Is denoted by a line parallel to the distance axis at any point on the time axis

Answer: B

Question: An example of a body moving with constant speed but still accelerating is
(a) A body moving in a helical path with constant speed
(b) A body moving with constant speed on a straight road
(c) A body moving with constant speed in a circular path
(d) A body moving with constant speed on a straight railway track

Answer: C

Question: SI Unit of measurement of acceleration is
(a) m/s2
(b) m/s
(c) M
(d) m/hr

Answer: A

Question: Formula to find the average velocity of a body is given by
(a) Vav=(u + v)/2
(b) Sn ={u + a/2(2n-1)}
(c) S= ut + 1/2 a t2
(d) V= u + at

Answer: A

Question: An object travels 20m in 5 sec and then another 40m in 5 se What is the average speed of the object?
(a) 2m/s
(b) 0 m/s
(c) 12m/s
(d) 6m/s

Answer: D

Question: A farmer moves along the boundary of a square field of side 10 m in 40 sec. The magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position is
(a) 10 `sqrt(2m)` 
(b) 30m
(c) 10m
(d) 40m

Answer: A

Question: A man travels a distance of 20 km from his home to office, and 10 km towards his house back. Then the displacement covered by the man in the whole trip is
(a) 30 Km
(b) 10 Km
(c) zero Km
(d) 50 Km

Answer: B

Question: Acceleration is a vector quantity, which indicates that its value
(a) Can be positive, negative or zero
(b) Is always positive
(c) Is always negative
(d) Is zero

Answer: A

Question: Rate of change of displacement is called
(a) Velocity
(b) deceleration
(c) Speed
(d) acceleration

Answer: A

Question. 180° plane angle is equal to
(a) π/2 radian
(b) π radian
(c) 2π radian
(d) none of these

Answer:   B

Question. Suppose a boy is enjoying a ride on a marry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is:
(a) At rest
(b) Moving with no acceleration
(c) In accelerated motion
(d) Moving with uniform velocity

Answer:   C

Question. 1 km/ h = ________ m/s
(a) 3/50
(b) 18/5
(c) 50/3
(d) 5/18

Answer:   D

Question. Which of the following statement is correct regarding velocity and speed of a moving body?
(a) Velocity of a moving body is always higher than its speed
(b) Speed of a moving body is always higher than its velocity
(c) Speed of a moving body is its velocity in a given direction
(d) Velocity of a moving body is its speed in a given direction

Answer:   D

Question. If car A is at 40 km/h and car B is at 10 km/h in the opposite direction, what is the velocity of the car A relative to the car B?
(a) 40 km/h
(b) 50 km/h
(c) 10 km/h
(d) 30 km/h

Answer:   B

Question. Which of the following is most likely not a case of uniform circular motion?
(a) Motion of the earth around the sun
(b) Motion of a toy train on a circular track
(c) Motion of a racing car on a circular track
(d) Motion of hours’ hand on the dial of a clock

Answer:  C

Question. A man is moving with 36 kmph. The time of reaction is 0.9 seconds. On seeing an obstacle in the path, he applies brakes and decelerates at 5 m/s2, the total distance covered before he stops is:
(a) 19 m
(b) 17 m
(c) 16 m
(d) 18 m

Answer:  A