Force, Motion & Gravity MCQs with Answers

A person weighing 600 N at the surface of earth at a particular location. When the same person is taken to a point located at higher altitude, then the weight of the same person will be

• A.Zero
• B.Greater than 600 N
• C.Equal to 600 N
• D.Less than 600 N

Force has _?

• A.Only magnitude
• B.Magnitude and direction
• C.Only direction
• D.Neither magnitude nor direction

Speed is defined as _?

• A.Rate of change of acceleration
• B.Rate of change of displacement with time
• C.Rate of change of distance in a specific direction
• D.Rate of change of Position in any time

The force of friction is always in the direction to that of the applied force.

• A.Same
• B.Opposite
• C.Perpendicular
• D.Parallel

The increase in kinetic energy associated with decreased pressure of a fluid in a horizontal pipe is a consequence of the _?

• A.Pascal's Law
• B.Bernoulli's Principle
• C.Archimedes' Principle
• D.Hooke's Law

The apparent weight of a person when the elevator is accelerating downwards is ?

• A.Equal to the actual weight
• B.Less than the actual weight
• C.Greater than the actual weight
• D.Zero at all times

A roller coaster is moving with 30 ms⁻¹ on a circular track of radius 30 m. The net mass of coaster + passengers is 'm'. The centripetal force acting on it is?

• A.60m
• B.15m
• C.30m
• D.m/30

A 1000 kg elevator is rising and its speed is increasing at 3 m/s². The tension force of the cable on the elevator is _?

• A.6800 N
• B.9800 N
• C.3000 N
• D.12800 N

The rate of change of angular momentum is called?

• A.Moment of inertia
• B.Angular velocity
• C.Torque
• D.Angular acceleration

In laminar flow of fluid, its adjacent layers ?

• A.Remain completely stationary
• B.Move randomly in all directions
• C.Cross into each other's path
• D.Slide smoothly past each other