Force, Motion & Gravity MCQs with Answers

A force of 15 N makes an angle of 60° with horizontal. Its vertical component will be ?

• A.15 N
• B.13 N
• C.7.5 N
• D.10 N

When brakes of a car are applied, angular velocity of a flywheel reduces from 900 cycles/minute to 720 cycles/minute in 6 seconds. The angular retardation is _?

• A.π/3 rad/s²
• B.π rad/s²
• C.2π rad/s²
• D.π/2 rad/s²

A body is said to be in _ if it changes its position with respect to its surroundings or due to another body.

• A.Rest
• B.Equilibrium
• C.Motion
• D.Inertia

Rate of change of linear momentum is called _?

• A.Work
• B.Impulse
• C.Acceleration
• D.Force

The velocity time graph is a straight line parallel to the time axis, then acceleration is?

• A.Decreasing
• B.Constant
• C.Increasing
• D.Zero

Simple harmonic motion is also called?

• A.Periodic motion
• B.Rotatory motion
• C.Translatory motion
• D.Random motion

The SI unit of momentum is?

• A.Joule per second
• B.Kg-m/s²
• C.Newton-metre
• D.Kg-m/s

Two masses are separated by a distance r. If both masses are doubled, the force of interaction between the two masses changes by a factor of ?

• A.2
• B.8
• C.4
• D.16

A cyclist bends while taking a turn to _?

• A.Generate centripetal force
• B.Reduce friction
• C.Increase speed
• D.Generate centrifugal force

A displacement-time graph is a straight line inclined up at an angle of 45° with the X-axis. The velocity of the body according to this graph is _?

• A.Constant
• B.Increasing
• C.Decreasing
• D.Zero