General Physics Quiz

The center of mass of a uniform circular disk is located:

• At its center

• Along its edge

• At a point halfway between the center and the edge

• Outside the disk

If two objects of unequal masses are placed on a rigid rod, the center of mass will be:

• Closer to the heavier object

• Closer to the lighter object

• At the midpoint of the rod

• At an unpredictable location

The center of mass of a system of particles depends on:

• The shape of the objects only

• The masses and their positions

• The material of the objects

• The shape and material

If a projectile follows a parabolic trajectory, its center of mass:

• Moves in a straight line

• Moves along the parabola

• Remains stationary

• Oscillates

The center of mass of a solid cone lies:

• At its base

• At its vertex

• Along the axis, one-fourth the distance from the base

• Along the axis, one-third the distance from the base

Momentum is defined as:

• Mass × velocity

• Force × distance

• Mass × acceleration

• Energy × time

If the momentum of an object is doubled, its kinetic energy:

• Remains the same

• Doubles

• Quadruples

• Halves

A 2 kg ball moving at 5 m/s has a momentum of:

• 10 kg·m/s

• 20 kg·m/s

• 25 kg·m/s

• 30 kg·m/s

Which of the following objects has zero momentum?

• A stationary object

• An object in uniform motion

• A moving object with zero acceleration

• An object in free fall

The law of conservation of momentum is applicable when:

• External forces are present

• Only gravity acts on the system

• The net external force is zero

• Friction acts on the system