Force, Motion & Gravity MCQs with Answers

A _ with a rod, called an axle, through its center lifts or moves loads.

• A.Wheel
• B.Pulley
• C.Lever
• D.Screw

A body is in equilibrium when it has ?

• A.Zero acceleration
• B.Constant velocity
• C.Uniform speed
• D.Zero displacement

A man pulls a crate of mass 25 kg across leveled ground with a horizontal force of 60 N. A constant frictional force of 20 N acts on the crate. What is the acceleration of the crate?

• A.0.8 ms⁻²
• B.2.4 ms⁻²
• C.1.6 ms⁻²
• D.3.2 ms⁻²

A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration of the particle is?

• A.v/r
• B.v²/r
• C.v/r²
• D.v²/r²

A particle is travelling along a straight line OX. The distance x in meters of the particle from O at a time t is given by X = 37 + 27t - t³ where t is given in seconds. The distance of the particle from O when it comes to rest is:

• A.81 m
• B.101 m
• C.91 m
• D.111 m

Gravitational force between two bodies depends upon _?

• A.Mass of the bodies
• B.Distance between the bodies
• C.Both mass and distance
• D.None of these

In the absence of external torque, the quantity which remains conserved is _?

• A.Linear momentum
• B.Potential energy
• C.Kinetic energy
• D.Angular momentum

Conservation of linear momentum is equivalent to?

• A.Newton's first law of motion
• B.Newton's second law of motion
• C.Newton's third law of motion
• D.Law of conservation of energy

Find the time period of a simple pendulum whose length is 88.2 cm. The value of acceleration due to gravity is 9.8 m/s² at the place where experiment is performed.

• A.2.512 sec
• B.1.256 sec
• C.1.885 sec
• D.0.942 sec

F = kx is the mathematical expression of:

• A.Newton's law of gravitation
• B.Hooke's law
• C.Ohm's law
• D.Boyle's law