Mechanics AFCAT Questions

AFCAT Physics

Mechanics MCQ Questions


1.
A passenger in a moving bus is thrown forward when the bus suddenly stops. This is due to:
A.
Inertia of direction
B.
Inertia of rest
C.
Conservation of momentum
D.
Inertia of motion
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ANSWER :
D. Inertia of motion
2.
Which of the following is the correct statement of Newton's First Law of Motion?
A.
The rate of change of momentum is proportional to the applied force
B.
To every action there is an equal and opposite reaction
C.
Force equals mass times acceleration
D.
Every body continues in its state of rest or uniform motion in a straight line unless compelled by an external force
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ANSWER :
D. Every body continues in its state of rest or uniform motion in a straight line unless compelled by an external force
3.
Inertia of a body depends on:
A.
Mass of the body
B.
Volume of the body
C.
Acceleration of the body
D.
Velocity of the body
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ANSWER :
A. Mass of the body
4.
A book is lying at rest on a table. The force exerted by the table on the book is equal and opposite to the weight of the book. This is because:
A.
The book is in equilibrium as per Newton's First Law
B.
Of the law of conservation of momentum
C.
Of Newton's Third Law of Motion
D.
Of Newton's Second Law of Motion
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ANSWER :
A. The book is in equilibrium as per Newton's First Law
5.
When a horse suddenly starts moving, the rider tends to fall:
A.
Backward
B.
Sideways
C.
Downward
D.
Forward
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ANSWER :
A. Backward
6.
The SI unit of force is:
A.
Newton
B.
Watt
C.
Joule
D.
Dyne
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ANSWER :
A. Newton