CBSE Class 9 Science Chapter 8 Motion MCQs

From the given v-t graph, it can be inferred that the object is

• At rest

• In uniform motion

• Moving with uniform acceleration

• In non-uniform motion

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:

• At rest

• Moving with no acceleration

• In accelerated motion

• Moving with uniform velocity

A particle is moving in a circular path of radius r. The displacement after half a circle would be:

• Zero

• πr

• 2r

• 2πr

Which of the following can sometimes be ‘zero’ for a moving body? i. Average velocity ii. Distance travelled iii. Average speed iv. Displacement

Which of the following statement is correct regarding velocity and speed of a moving body?

• Velocity of a moving body is always higher than its speed

• Speed of a moving body is always higher than its velocity

• Speed of a moving body is its velocity in a given direction

• Velocity of a moving body is its speed in a given direction

When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:

• + 2 m/s2

• − 2 m/s2

• − 0.5 m/s2

• + 0.5 m/s2

The speed - time graph of a car is given here. Using the data in the graph calculate the total distance covered by the car.

• 1250 m

• 875 m

• 1500 m

• 870 m

A car of mass 1000 kg is moving with a velocity of 10 m/s. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of 25 s will be:

• 40 m/s

• 25 m/s

• 10 m/s

• 250 m/s

Which of the following is most likely not a case of uniform circular motion?

• Motion of the earth around the sun

• Motion of a toy train on a circular track

• Motion of a racing car on a circular track

• Motion of hours’ hand on the dial of a clock

In which of the following cases of motions, the distance moved and the magnitude of the displacement are equal? i. If the car is moving on a straight road ii. If the car is moving in circular path iii. The pendulum is moving to and fro iv. The earth is moving around the sun