Force, Motion & Gravity MCQs with Answers

Gravitational force of the moon ?

• A.Causes solar eclipses
• B.Keeps the moon in orbit around Earth
• C.Gives rise to tides in the sea
• D.Determines the phases of the moon

Which one is not a scalar quantity?

• A.Speed
• B.Mass
• C.Force
• D.Temperature

Time period of a seconds pendulum is second.

• A.1
• B.2
• C.0.5
• D.4

A body is said to have uniform velocity, which of the following relations will hold for average and instantaneous velocities?

• A.Average velocity is greater than instantaneous velocity
• B.Average velocity is less than instantaneous velocity
• C.Average velocity is equal to instantaneous velocity
• D.Average and instantaneous velocities are unrelated

Let L be the length and d be the diameter of cross section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases the extension of wire will be the maximum?

• A.L = 50 cm, d = 0.05 mm
• B.L = 100 cm, d = 0.10 mm
• C.L = 200 cm, d = 0.20 mm
• D.L = 75 cm, d = 0.10 mm

A particle moves at constant speed in a circular path. The instantaneous velocity and instantaneous acceleration vectors are ?

• A.Parallel to each other
• B.At 45° to each other
• C.Opposite to each other
• D.Perpendicular to each other

The force, which is always directed towards the same point is called as _?

• A.Central force
• B.Centrifugal force
• C.Tangential force
• D.Frictional force

A girl jumps with an initial velocity of 16 m/s. What is the maximum height she can reach?

• A.13.1 m
• B.12.8 m
• C.14.5 m
• D.10.2 m

What does the formula F=ma represent?

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

If a pendulum completes one cycle in half seconds, its frequency is ?

• A.0.5 Hz
• B.1 Hz
• C.2 Hz
• D.4 Hz