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Motion CBSE Class 9

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Motion Topics

Full fledge assessment Videos

Video Based Test funda (Please watch the above videos before attempting this assessment)
Question 1/20

Q 1. A body is said to be in uniform motion if it covers

Solution

A body is said to be in uniform motion if it covers equal distances in equal intervals of time.

Q 2. The following graph indicates that the moving body is undergoing    

Solution

In the speed-time graph, a straight line sloping downwards indicates that the body undergoes uniform retardation.

Q 3. Acceleration is the rate of change of __________with time. 

Solution

Acceleration is the rate of change of velocity with time.

Q 4. ____________ gives the velocity acquired by a body in time ‘t’.

Solution

First equation of motion gives the velocity acquired by a body in time t.

Q 5. The area enclosed by a speed-time curve and the time axis gives the 

Solution

The area enclosed by the speed-time curve and the time axis gives the distance traversed.

Q 6. In a velocity-time graph, the body moving with a constant velocity is a 

Solution

In a velocity-time graph, the body moving with a constant velocity is a straight line parallel to the time axis.

Q 7. While a toy car is moving along an octagonal track with a constant speed, its direction of motion changes ______ times. 

Solution

While a toy car is moving along an octagonal track with a constant speed, its direction of motion changes eight times.

Q 8. The straight line graph plotted for distance against time indicates that the body is moving with 

Solution

The straight line graph plotted for distance against time indicates that the body is moving with uniform speed. 

Q 9. The CGS unit of speed is

Solution

The CGS unit of speed is cm/s.

Q 10. When an object is moving in a straight line with constant speed, 

Solution

When an object is moving in a straight line with constant speed, it is not an accelerated motion.

Q 11. If a is the initial velocity which changes to the final velocity in time c, then acceleration d is 

Solution

Acceleration = (final velocity - initial velocity)/time

Q 12. Velocity is a ____ quantity.

Solution

Velocity is a vector quantity.

Q 13. For a distance-time graph, a body moving with uniform speed is a

Solution

For a distance-time graph, a body moving with uniform speed is a straight line graph.

Q 14. A car is traversing through a crowded street on a straight road. It is moving with

Solution

A car is traversing through a crowded street on a straight road. It is moving with non-uniform velocity.

Q 15. Displacement depends on

Solution

Displacement depends on magnitude as well as direction.

Q 16. A body is said to be in non-uniform motion when it covers

Solution

A body is said to be in non-uniform motion when it covers unequal distances in unequal intervals of time.

Q 17. High speed values are expressed using

Solution

High speed values are expressed using kilometre per hour.

Q 18. The SI unit of acceleration is 

Solution

The SI unit of acceleration is m/s2. 

Q 19. In the distance-time graph, distance is plotted on the

Solution

In the distance-time graph, distance is plotted on the Y-axis.

Q 20. The second hand rotates from number 12 to number 6 in a clock having a radius of 7 cm. What is the distance travelled by the second hand?

Solution

Distance travelled = Circumference of clock/2 =2 r/2

= 2 x 22/7 x 7/2 = 22 cm

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Motion Notes

Revision Notes

Read CBSE Class 9 Physics revision notes for Motion

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Motion Tests

Motion Textbook Solutions

Motion Doubts and Solutions

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