MULTIPLE CHOICE QUESTIONS :(MCQ’s)
1. Forces are called____ forces and do can the state of rest or of motion of an object.
(a) Balanced
(b) Unbalanced
(c) Static
(d) Molecular
2. If an unbalanced force is applied on the object, there will be a change either in its ____ or in the ____ of its motion.
(a) Velocity,direction
(b) Speed, direction
(c) Speed, velocity
(d) Acceleration, speed
3. Three fundamental laws that govern the motion of objects. These three laws are known as ____ law of motion.
(a) Mendeelev’s
(b) Ohms’
(c) Newton’s
(d) None of these
4. ____ is a natural tendency of of an object to resist a change in its state of motion or of rest.
(a) Acceleration
(b) Velocity
(c) Speed
(d) Inertia
5. The ____, of an object is defined as the product of its mass, m and velocity, v.
(a) Force
(b) Speed
(c) Magnitude
(d) Momentum
6. Momentum as both ____ and ____.
(a) Direction,Speed
(b) Magnitude,Speed
(c) Direction, Magnitude
(d) Velocity, Speed
7. The SI unit of magnitude is ____.
(a) Watt (w)
(b) Kilogram meter per sec (kgms-1)
(c) Metres per second (ms-1 )
(d) Newton (N)
8. The second law of motion states that the rate of change of momentum of an object is ____ to the applied unbalanced force in the direction of force.
(a) Proportional
(b) Equal
(c) Adjacent
(d) Parallel
9. The unit of force is kg ms-2 or ____.
(a) Newton
(b) Watt
(c) Joule
(d) Ohm
10. When a gun is fired, it exerts a forward force on the bullet. The bullet exerts an ____ and ____ force on the gun.
(a) Straight,equal
(b) Equal, opposite
(c) Unequal,opposite
(d) Equal,parallel
11. An object continues to be in a state of rest or of uniform motion along a straight line unless acted upon by an ____ force.
(a) Balanced
(b) Parallel
(c) Unbalanced
(d) Opposite
12. The mass of an object is a measure of its ____.
(a) Density
(b) Acceleration
(c) Velocity
(d) Inertia
13. Force of friction always opposes the _____ of objects.
(a) Friction
(b) Direction
(c) Path
(d) Motion
14. A force of one newton produces an ____ of 1 ms-2 on an object of mass 1 kg.
(a) Speed
(b) Velocity
(c) Force
(d) Acceleration.
15. According to the third law of motion, action and reaction ______ .
(a) Always act on the same body
(b) Always act on different bodies in opposite directions
(c) Have same magnitude and directions
(d) Act on either body at normal to each other
16. A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to ______ .
(a) Exert larger force on the ball
(b) Reduce the force exerted by the balls on the hands
(c) Increase the rate of change of momentum
(d) Decrease the rate of change of momentum
17. The inertia of an object tends to cause the object to____ .
(a) Increase its speed
(b) Decrease its speed
(c) Resist any change in its state of motion
(d) Decelerate due to friction
18. A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is ____.
(a) Accelerated
(b) Uniform
(c) Retarded
(d) Along circular tracks
19. Rocket works on the principle of conservation of ____ .
(a) Mass
(b) Energy
(c) Momentum
(d) Velocity
20. A water tanker filled up to 2/3 of its height is moving with a uniform speed. On a sudden application of brakes, the water in the tank would_____ .
(a) Move backward
(b) Move forward
(c) Be unaffected
(d) Rise upwards
21. When a number of forces acting simultaneously on a body bring about a change in its state of rest or of uniform motion in a straight line, then these forces acting on the body are said to be ____.
(a) Balanced forces
(b) Equal forces
(c) Unbalanced forces
(d) Opposite forces
22. When a car at high speed makes a sharp turn, the driver in a car tends to get thrown to the side opposite to the turn. This is due to the____ .
(a) Inertia of motion
(b) Inertia of time
(c) Inertia of rest
(d) Inertia of direction
23. A man is standing on a boat in still water. If he walks towards the shore, then the boat will ____.
(a) Move away from the shore
(b) Move towards the shore
(c) Remain stationary
(d) None of these
24. A ball is thrown vertically upward in a train moving with uniform velocity. The ball will ___.
(a) Fall behind the thrower
(b) Fall ahead of the thrower
(c) Return back to the thrower
(d) Fall on the left of the thrower
25. An athlete does not come to rest immediately after crossing the winning line due to the ____ .
(a) Inertia of motion
(b) Inertia of rest
(c) Inertia of direction
(d) None of these
26. The momentum of an object is product of its mass and _____
(a) Motion
(b) Direction
(c) Velocity
(d) None of these
27. Recoiling of gun is an example of _____law of motion.
(a) First
(b) Second
(c) Third
(d) Fourth
28. When a carpet is beaten with a stick, dust particle comes out. This is an example of ____ law of motion.
(a) First
(b) Second
(c) Third
(d) Fourth
29. The unit of force is _____
(a) Joule
(b) Newton
(c) Watt
(d) None of these
30. The S.I unit of momentum is ____
(a) g m/s
(b) kg cm/s
(c) kg m/s²
(d) kg m/s
Answers:
1. (a) Balanced
2. (b) Speed, direction
3. (c) Newton’s law
4. (d) Inertia
5. (d) Momentum
6. (c) Direction, magnitude
7. (b) Kilogram meter per sec (kgms-1)
8. (a) Proportional
9. (a) Newton
10. (b) Equal, opposite
11. (c) Unbalanced
12. (d) Inertia
13. (d) Opposes
14. (d) Acceleration
15. (b) Always act on different bodies in opposite directions
16. (d) Decrease the rate of change of momentum
17. (c) To resist any change in its state of motion
18. (a) Accelerated
19. (c) Momentum
20. (b) Move forward
21. (d) Opposite forces
22.(a) Inertia of motion
23.(a) Move away from the shore
24. (c) Return back to the thrower
25. (a) Inertia of motion
26. (c) Velocity
27. (c) Third
28. (a) First
29.(b) Newton
30.(d) kg m/s
