Force, Motion & Gravity MCQs with Answers

Two uniform spheres are pivoted on horizontal axes that are tangent to their surfaces. The one with the longer period of oscillation is the one with _?

• A.The larger radius
• B.The smaller radius
• C.The greater mass
• D.The lesser mass

The instantaneous velocity along the curved path is _?

• A.Along the normal
• B.Along the radius
• C.Along the chord
• D.Along the tangent

In projectile motion, the only force of significance that acts on the object is _?

• A.Gravitational force
• B.Magnetic force
• C.Electrostatic force
• D.Nuclear force

If an object is released 19.6 meters above the ground, how long does it take the object to reach the ground? (g = 9.8 m/s²)

• A.1 second
• B.2 seconds
• C.3 seconds
• D.4 seconds

The relation between total time of flight and height of projectile is _?

• A.H = gT²/8
• B.H = gT²/2
• C.H = gT²/4
• D.H = 2gT²

In circular motion, if angular displacement is kept constant, decreasing the radius will ?

• A.Decrease the linear displacement
• B.Increase the linear displacement
• C.Have no effect on linear displacement
• D.Make linear displacement zero

Force that picks up the pace of a sky rocket in external space is exerted on the rocket by ?

• A.Atmospheric air
• B.Gravitational pull of Earth
• C.Solar wind
• D.Exhaust gases

In rotational motion, the analog of force is ?

• A.Angular velocity
• B.Momentum
• C.Torque
• D.Work

When two surfaces move or slide over each other, they experience:

• A.Frictional force
• B.Gravitational force
• C.Magnetic force
• D.Electrostatic force

A submarine has circular windows of diameter 0.30m. The windows can experience a maximum external pressure of 660 kPa before they crack. What is the minimum external force needed to crack the windows?

• A.47000 N
• B.66000 N
• C.31000 N
• D.94000 N