Force, Motion & Gravity MCQs with Answers

According to Bernoulli’s principle, when the speed of a fluid increases, the pressure?

• A.Increases
• B.Decreases
• C.Remains constant
• D.First increases then decreases

To achieve high rocket velocity, one must have ?

• A.High exhaust velocity and lower loss of mass during propulsion
• B.Low exhaust velocity and higher loss of mass during propulsion
• C.High exhaust velocity and higher loss of mass during propulsion
• D.Low exhaust velocity and lower loss of mass during propulsion

Ball bearing is used to?

• A.Reduce friction
• B.Increase friction
• C.Transfer motion
• D.Both ends

Change in momentum in one second is called _?

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

In which type of frame of reference are Newton's laws not valid?

• A.Inertial frame
• B.Rest frame
• C.Non-inertial frame
• D.Absolute frame

A rectangular piece of wood is kept in three different positions (A, B, C) on a table. The pressure exerted by the wood on the table will be:

• A.Same in all positions
• B.Maximum in position B
• C.Maximum in position C
• D.Maximum in position A

Two masses of 7 kg and 3 kg respectively are hanging on a frictionless pulley. Calculate the acceleration of the system.

• A.9.8 ms⁻²
• B.2 ms⁻²
• C.6 ms⁻²
• D.4 ms⁻²

Acceleration of a rolling object is zero at which point of a hill?

• A.At the lowest point
• B.At the highest point
• C.At the midpoint of the slope
• D.Acceleration is never zero

A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is ?

• A.3.14 Hz
• B.2 Hz
• C.0.5 Hz
• D.1 Hz

Gears can do all of the following except?

• A.Change speed
• B.Change direction of force
• C.Change fulcrum
• D.Change torque