Force, Motion & Gravity MCQs with Answers

The volume of a gas sample is halved while keeping the temperature constant. According to Boyle's law, what will happen to the pressure of the gas?

• A.It will double
• B.It will become half
• C.It will remain the same
• D.It will become one-fourth

Amplitude in the following figure is given as?

• A.The distance between two consecutive troughs
• B.The total distance between two consecutive crests
• C.The distance from the mean position to the extreme position
• D.The time taken to complete one full oscillation

The force of attraction among water molecules is?

• A.Adhesion
• B.Cohesion
• C.Surface tension
• D.Capillarity

Friction is directly proportional to the?

• A.Volume of body
• B.Velocity of body
• C.Area of contact
• D.Weight of body

Screwdriver is an example of _?

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

The Bernoulli's equation relates the pressure, velocity, and height of a fluid in a streamline. Which of the following assumptions is NOT made in the derivation of Bernoulli's equation?

• A.The fluid is incompressible
• B.The flow is steady and laminar
• C.No external forces acting on the fluid
• D.The fluid is non-viscous (ideal)

Turbulent flow occurs when the Reynolds number is above ?

• A.2000
• B.4000
• C.5000
• D.3000

Why is it easier to swim in a sea than a river?

• A.Sea water has lower viscosity than river water
• B.Sea water is warmer than river water
• C.Density of sea water is more than that of river
• D.Sea water contains less salt than river water

When a constant force is applied, what moves with uniform motion?

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

A person climbing a hill bends forward in order to:

• A.Increase speed
• B.Increase stability
• C.Reduce friction
• D.Conserve energy