Multiple choice questions of Chapter 3 of Physics for First Year.

1. A body covering equal displacement in equal interval of time possesses:
a) Variable velocity
b) Uniform acceleration
c) Uniform velocity
d) None of above

2. Instantaneous and average velocities become equal when body:
a) Has zero acceleration
b) Has uniform velocity
c) Has variable velocity
d) Moves in a circle

3. When velocity time graph is a straight line parallel to time axis then:
a) Acceleration is const
b) Acceleration is variable
c) Acceleration is zero
d) Velocity is zero

4. Slope of velocity time graph is:
a) Acceleration
b) Distance
c) Force
d) Momentum

5. The area between the velocity-time graph and the time axis is numerically equal to:
a) Velocity
b) Distance
c) Time
d) Acceleration

6. If the slop of velocity-time graph gradually decreases, then the body is said to be moving with:
a) Positive acceleration
b) Negative acceleration
c) Uniform velocity
d) Variable velocity

7. If the slop of velocity-time graph gradually increases, then the body is said to be moving with:
a) Positive acceleration
b) Negative acceleration
c) Uniform velocity
d) Variable velocity

8. What is the shape of velocity time graph for constant acceleration?
a) Straight line
b) Parabola
c) Inclined curve
d) Declined curve

9. When the object is moving towards earth, the value of “g” is taken as:
a) Positive
b) Negative
c) Zero
d) None

10. Change in momentum is called:
a) Force
b) Impulse
c) Acceleration
d) Torque

11. The time rate of change of momentum is called:
a) Force
b) Impulse
c) Acceleration
d) Torque

12. The property of a body due to which it opposes its state of rest or uniform motion is called:
a) Momentum
b) Inertia
c) Torque
d) Weight

13. Which law of motion is also called law of inertia?
a) 1st law
b) 2nd law
c) 3rd law
d) 4th law

14. Inertia of an object is quantitative measure of its:
a) Volume
b) Density
c) Mass
d) Temperature

15. Momentum depends upon.
a) Force act on the body
b) Mass of the body
c) Velocity of the body
d) Both mass and velocity of the body

16. An alternate unit to 𝑘𝑔 𝑚𝑠 −1 is:
a) Js
b) Ns
c) Nm
d) N

17. SI unit of impulse is:
a) 𝑘𝑔 𝑚 𝑠 −2
b) 𝑁 𝑠
c) 𝑁
d) None of these

18. The dimension of acceleration is.
a) 𝐿𝑇 −1
b) LT-2
c) 𝐿 2𝑇 2
d) 𝐿 𝑇 −2

19. The dimension of force is.
a) MLT-2
b) 𝑀𝐿 2𝑇 −2
c) 𝑀𝐿 2𝑇 2
d) 𝑀𝐿 −2𝑇 −2

20. Which of the following pair has same direction always?
a) Force, displacement
b) Force, velocity
c) Force, acceleration
d) Force, momentum

21. A snooker ball moving with velocity v collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of the second snooker ball is:
a) Zero
b) Infinity
c) V
d) 2V

22. Taking off rocket can be explained by.
a) 1 st law of motion
b) 2 nd law of motion
c) Law of conservation of momentum
d) Law of conservation of energy

23. The trajectory (or path) of a projectile is.
a) Straight line
b) Parabola
c) Hyperbola
d) Circle

24. A football player will throw a football at maximum distance if the angle of projection is:
a) 300
b) 450
c) 600
d) 900

25. Range of a projectile on a horizontal plane is same for the following pair of angles:
a) 300 and 600
b) 200 and 800
c) 0 0 and 450
d) 100 and 900

26. During projectile motion, the horizontal component of velocity:
a) Changes with time
b) Becomes zero
c) Remains constant
d) Increases with time

27. Motion of projectile is _____________ dimensional.
a) One
b) Two
c) Three
d) Four

28. The velocity of projectile at its maximum height is:
a) 𝑣𝑖 sin 𝜃
b) 𝑣𝑖 cos 𝜃
c) Maximum
d) Zero