CBSE Class 7 Science motion And Time Worksheet Set B

Question. Which roller coaster will have the least speed at the top of the second hill?

Answer : C

Question. The unit used to measure distance is metres (m). The unit used to measure time is seconds (s). Speed = Distance / Time. Hence the unit used to measure speed is m/s.
Now, momentum= mass x velocity.
Velocity has the same unit as that of speed. What would be the unit of momentum?
(a) kg m/ s
(b) kg m/ s2
(c) m/s2
(d) s/kg m

Answer : A

Question. Which of the following is true for the egg beater / lassi maker shown in the picture?

(a) A lever is used to increase the force applied.
(b) An inclined plane is used to reduce the force required.
(c) A gear is used to change the direction of rotation.
(d) A pulley is used to change the direction of force.

Answer : A

Question. Two cars P and Q are moving at constant speeds on circular paths in such a way that when P completes one full circle, Q completes half a circle. The question is based on this.
Through how many degrees at the centre of its circular path would P have moved when it is at the closest distance to Q for the FIRST time?

(a) 180°
(b) 360°
(c) 540°
(d) 720°

Answer : C

Question. I am sitting in a train that is moving at a speed of 60 kilometres per hour (kmph). If a train now passes in the opposite direction at a speed of 80 kmph, what would its speed APPEAR to be to me?
(a) 20 kmph in the direction of my train.
(b) 20 kmph in the direction opposite to my train.
(c) 140 kmph in the direction of my train.
(d) 140 kmph in the direction opposite to my train.

Answer : D

Question. Identify the picture which shows the correct path of the striker on the carrom board

Answer : A

Question. Ayesha is travelling in a train. As she is looking out of the window, another train on an adjacent track moving in the same direction overtakes her train.
Which of the following is TRUE?
(a) To Ayesha, the other train will appear to be travelling FASTER than it actually is.
(b) To Ayesha, the other train will appear to be travelling SLOWER than it actually is.
(c) To Ayesha, the other train will appear to be travelling AT THE SAME SPEED as it actually is.
(d) To Ayesha, the other train will appear to be travelling in the opposite direction.

Answer : B

Question. In a compartment of a moving train a boy throws up a ball. Where is the ball MOST likely to fall?

(a) into the boy's own hands
(b) ahead of the boy
(c) behind the boy
(d) (it depends on the direction of motion of the train)

Answer : A

Question. Many printing presses use rollers, which are long cylinders often made of rubber, to transfer inks. Rollers are usually friction driven by a drive roller. In the figure given, which roller(s) will turn in the same direction as the drive roller?

(a) Only R1
(b) R2 and R5
(c) R3 and R4
(d) R4 and R5

Answer : B

Question. If a cricket pitch were made vertical, it would approximately be as tall as a building with how many storeys?
(a) one
(b) four
(c) ten
(d) thirty

Answer : B

Question. Bangalore is to the __________of Chennai.
The cities Bangalore and Chennai are almost at the same latitude. Study the table given below and answer the question

(a) North
(b) South
(c) East
(d) West

Answer : D

Question. A person climbs a steep hill. Identify the posture of the person while climbing the hill.

Answer : A

Question. The unit of distance is metres (m).  Speed is the rate of change of distance. Its unit is metres / second (m/s).Which one of these could be a unit of rate of change of speed?
(a) m
(b) m/s.
(c) m/s²
(d) Kmph

Answer : C

Question. Sanjana is lying down on the top berth of a train compartment. The train is travelling at a constant speed. Sanjana now drops a ball from the top berth. Where will the ball fall, compared to where it would have fallen if the train were not moving?
(a) Exactly at the same position.
(b) A little ahead of that position in the direction of the train's motion.
(c) A little behind that position with respect to the direction of the train's motion.
(d) It is not possible to specify - it may fall at A, B or C above.

Answer : A

Question. In the arrangement shown the toothed wheel P is making 10 turns per minute in a clock wise direction. What can be said about wheel S? (The connecting rods can only rotate.) 

(a) It will turn at the same speed in clockwise direction.
(b) It will turn at a lower speed in clockwise direction.
(c) It will turn at a faster speed in clockwise direction.
(d) It will not turn at all in any direction.

Answer : B

TOPIC :MOTION AND TIME

 

g) Identify the type of motion in the graph given below.

 

h) A train makes 25 hours to reach a place B from a place A. If the speed of the train is 70km/hr. What is the distance between A and B in 6km/hr. Express in m/sec.

 

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i)Complete the following the table

Please click on below link to download CBSE Class 7 Science motion And Time Worksheet Set B