# MCQ On Motion Class 9 Chapter 8 Science

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What is Motion?

Motion refers to the movement or change in position of an object over time. It can be described in terms of distance, velocity, and acceleration. The study of motion is known as mechanics. There are different types of motion, including linear motion (motion in a straight line) and rotational motion (motion around an axis). The laws of motion, first described by Sir Isaac Newton, form the basis of classical mechanics and explain the behavior of objects in motion.

## MCQ for Class 9 Science Chapter 8 Motion with Answers

1. What would be the displacement of a molecule moving in a circular path of radius r after a displacement of half a circle?

(a) 2πr

(b) πr

(c) 2r

(d) Zero

2. The path length moved by a body in a given time interval is known as _____.

(a) distance

(b) velocity

(c) acceleration

(d) moment

3. Which of the below situations is true & possible?

(a) The acceleration of a body can be non-zero even though its velocity is zero.

(b) Despite its continual motion, a body might experience acceleration.

(c) In a circular motion, the magnitudes of distance and displacement are identical.

(d) All of the above

Answer: (a) The acceleration of a body can be non-zero even though its velocity is zero.

4. The definition of velocity is ____ per time.

(a) distance

(b) displacement

(c) power

(d) acceleration

5. A body moving in a straight line has a constant motion if it travels _____ distance in equal time intervals.

(a) equal

(b) Unequal

(c) Short

(d) long

6. Suppose a boy is moving with a constant velocity of 10 m/s on a merry-go-round ride. Which of the below is true of the given scenario?

(a) The boy is at rest

(b) The boy is moving with zero acceleration

(c) The boy is moving with accelerated gesture

(d) The boy is moving with constant velocity

Answer: (c) The boy is moving with accelerated gesture

7. What is indicated by the slope of the time-distance graph?

(a) speed

(b) velocity

(c) acceleration

(d) displacement

8. What info does the velocity-time graph’s slope provide?

(a) speed

(b) velocity

(c) acceleration

(d) displacement

9. Which of the below is true of a free-falling body?

(a) It moves with non-uniform gesture

(b) It has 0 velocity

(c) It has uniform non-zero acceleration

(d) It has non-constant acceleration

Answer: (c) It has uniform non-zero acceleration.

10. The physical quantity that has both direction & magnitude is called as

(a) vectors

(b) scalars

(c) Both(a) and (b)

(d) Neither (a) or (b)

11. The acceleration’s direction matches the direction of _______.

(a) displacement

(b) change in velocity

(c) velocity

(d) all of these

12. The area below a velocity-time graph gives __________.

(a) distance

(b) acceleration

(c) speed

(d) displacement

13. ________can be add up algebraically.

(a) Accelerations

(b) Velocities

(c) Distances

(d) Any physical quantities

14. A physical quantity which has both direction & magnitude is known as _______.

(a) scalar quantity

(b) vector quantity

(c) neither (a) nor (b)

(d) either (a) or (b)

15. The distance-time graph of a body in motion along a straight path in a single direction with uniform speed will be _____.

(a) along X-axis

(b) a line with positive slope

(c)  parallel to X-axis

(d) None of these

Answer: (b) a line with positive slope

16. If an object travels unequal distances in equal periods of time along a _______ path, the body is known to be in ___________.

(a) curved, uniform motion

(b) pentagonal, uniform motion

(c) rectangular, uniform motion

(d) straight, non-uniform motion

17. A freely falling object is known to be moving with _____.

(a) uniform non-zero acceleration

(b) non-uniform motion

(c) zero velocity

(d) non-uniform acceleration

18. An object travels along a straight path from its initial position to a point 20 m away & then returns back to its starting position. The change in the position of an object is ____ & the distance covered is ______.

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(a) 20 m, 40 m

(b) 0 m, 40 m

(c) 40 m, 40 m

(d) 0 m, 0 m

Answer: (b) 0 m, 40 m

19. The slope of a velocity-time graph indicates__________.

(a) distance

(b) speed

(c) acceleration

(d) displacement

20. The position-time graph of an object is parabolic, then the object is ______.

(a)  in non-uniform motion

(b) in uniform acceleration

(c) at rest with some initial distance covered

(d) at rest with 0 initial distance covered

21. An object covering equal distances in equal intervals of time is said to be moving with constant velocity if the body moves along a _________ path.

(a) straight

(b) rectangular

(c) circular

(d) hexagonal

22. The slope of a distance-time graph indicates_______.

(a) displacement

(b) acceleration

(c) velocity

(d) speed

23. If an object covers equal distances in equal intervals of time, then_______.

(a) the object is moving with constant velocity

(b) the object is moving with constant acceleration

(c) the object may be moving with constant velocity

(d) the object is moving with constant deceleration

Answer: (c) the object may be moving with constant velocity

24. The distance-time graph of the motion of an object is parallel to X-axis, then the object is ______.

(a) at rest with zero initial distance travelled

(b) at rest with some initial distance travelled

(c) in non-uniform gesture

(d) constant acceleration

Answer: (b) at rest with some initial distance travelled

25. Identify the sentence which is true

Sentence A: Average velocity of an object may be equal to the instantaneous velocity of the object.

Sentence B: The speed-time graph of an object which is in constant motion will be a straight-line coinciding with X-axis.

(a) Statement A is true

(b) Statement B is true.

(c) Both statements A, B are true.

(d) Neither statement A nor statement B is true.

26. Which is the most simple kind of motion among the options below?

a) Motion in straight line

b) Motion in plane.

c) Motion in space

d) Motion of projectile.

Answer: (a) Motion in straight line

27. If a body moves 4 km in a straight line then the value of displacement is….

a) 4 km

b) 8 km

c) 12 km

d) 0 km

28. Speed based on…

a) Path length

b) Displacement

c) Initial & final position of the body.

d) None of these.

29. Velocity of the particle lies on….

a) Distance

b) Displacement

c) Path of the object

d) None of these.

30. The area of the speed time graph is marked by…

a) Distance

b) Acceleration

c) Velocity

d) Speed

31. We can derive the 1st equation of kinematics from the formula of….

a) Distance

b) Speed

c) Acceleration

d) Velocity

32. Which of the below is the example of constant motion.

a) Zig-zag motion of butterfly

b) Motion of aero plane before take off

c) Motion of periods of soldiers.

d) Motion of fan after switch off.

33. A bus is travelling at a speed of 10 m/s. How much time is needed to stop that bus if the driver slows it down at the rate of 2 m/s².

a) 5 seconds

b) 10 seconds

c) 4 seconds

d) 8 seconds

34. If you throw any kind of ball in an upward direction then the value of g will be…

a) Positive

b) Negative

c) We can not say

d) It is not fixed