Free Test Laws of Motion – JEE

Q1: What is the SI unit of force?

A. Newton B. Joule C. Pascal D. Watt

Q2: Which law explains the reason for using seat belts in cars?

A. Newton's First Law B. Newton's Second Law C. Newton's Third Law D. Law of Gravitation

Q3: According to Newton’s second law, force is equal to:

A. Mass × Displacement B. Mass × Acceleration C. Mass × Velocity D. Mass × Speed

Q4: Action and reaction forces:

A. Act on same body B. Are always equal and opposite C. Cancel each other D. Occur at different times

Q5: What is the force on a 1 kg mass falling freely under gravity?

A. 0 N B. 9.8 N C. 1 N D. 98 N

Q6: What is inertia?

A. Ability to accelerate B. Resistance to change in motion C. Force applied on body D. Speed of body

Q7: When no net force acts on a body, it will:

A. Accelerate B. Remain at rest or move uniformly C. Move in a circle D. Vibrate

Q8: The unit of impulse is:

A. N·s B. kg·m/s² C. kg·m/s³ D. N·m

Q9: A 5 kg body has an acceleration of 2 m/s². The net force is:

A. 2.5 N B. 10 N C. 7 N D. 12 N

Q10: Friction always acts in:

A. Direction of motion B. Opposite to applied force C. Direction opposite to motion D. Random direction

Q11: If net external force on system is zero, momentum is:

A. Increasing B. Constant C. Decreasing D. Negative

Q12: A horse pulls a cart. According to Newton’s 3rd law:

A. Only horse experiences force B. Only cart experiences force C. Cart pulls back with equal force D. None experience force

Q13: Coefficient of friction depends on:

A. Mass of object B. Area of contact C. Nature of surfaces D. Velocity of object

Q14: Normal reaction acts:

A. Along force of gravity B. Along direction of motion C. Perpendicular to contact surface D. Opposite to friction

Q15: Limiting friction is proportional to:

A. Area B. Velocity C. Normal reaction D. Mass

Q16: A block on smooth horizontal surface has no motion. Net force is:

A. Non-zero B. Depends on gravity C. Zero D. Maximum

Q17: Static friction is:

A. More than kinetic B. Less than kinetic C. Equal to kinetic D. Independent of surface

Q18: Mass is a measure of:

A. Volume B. Inertia C. Density D. Weight

Q19: Impulse equals change in:

A. Force B. Speed C. Momentum D. Acceleration

Q20: Which is a pseudo force?

A. Friction B. Centripetal force C. Centrifugal force D. Gravitational force

Quiz for Laws of Motion