Force, Motion & Gravity MCQs with Answers

While going towards the center of the earth, the weight of a body shall _?

• A.Increase
• B.Decrease
• C.Remain the same
• D.First increase then decrease

A body moving in a circular path with constant speed has?

• A.Constant velocity
• B.Constant acceleration
• C.Zero acceleration
• D.Variable acceleration

The unit of inertia depends on?

• A.Mass
• B.Velocity
• C.Acceleration
• D.Momentum

The velocity of a car travelling on a straight road is 36 km/h at an instant of time. Now travelling with uniform acceleration for 10 s, the velocity becomes exactly double. If the wheel radius of the car is 25 cm, then which of the following is the closest to the number of revolutions that the wheel makes during this 10 s?

• A.75
• B.95
• C.115
• D.135

Speed of any object can be changed by?

• A.Force
• B.Mass
• C.Density
• D.Volume

Gravitational force is always ?

• A.Attractive
• B.Repulsive
• C.Both attractive and repulsive
• D.None of these

Magnitude of two vectors are 3N and 4N respectively. If the angle between them is a right angle then their resultant vector will be ?

• A.5N
• B.7N
• C.1N
• D.12N

The cross product of two vectors is a negative vector when _?

• A.They are parallel vectors
• B.They are perpendicular vectors
• C.They are anti-parallel vectors
• D.They are equal vectors

The Magnus effect explains the behavior of?

• A.Spinning objects in fluid
• B.Falling objects under gravity
• C.Floating objects on water
• D.Expanding gases under heat

Which simple machine is used in bicycle to travel?

• A.Inclined plane
• B.Pulley
• C.Lever
• D.Wheel and axle