Chapters 3 and 4 Combo Quiz

Which of the following best describes momentum in physics?

• Speed of an object

• Inertia in motion

• Total energy of a system

• Force applied to an object

The momentum equation p = mv indicates that momentum is directly proportional to:

• Mass only

• Velocity only

• Both mass and velocity

• Inverse of mass and velocity

In an elastic collision, what remains constant?

• Total heat energy

• Momentum and kinetic energy

• Potential energy

• Total mass of the system

Impulse is defined as:

• Force divided by time

• Force multiplied by time

• Velocity multiplied by mass

• Change in potential energy

The work-energy theorem suggests that:

• Work is always equal to potential energy

• Net work equals change in kinetic energy

• Energy can be created from nothing

• Kinetic energy is constant in all systems

Gravitational potential energy depends on:

• Speed of the object

• Mass, gravity, and height

• Direction of motion

• Temperature of the environment

Power is best described as:

• Total energy in a system

• Rate of energy transformation

• Momentum of an object

• Force multiplied by distance

In the conservation of momentum, what remains constant?

• Kinetic energy

• Potential energy

• Total momentum of the system

• Mass of individual objects

Kinetic energy is calculated as:

• mv

• ½mv²

• mg

• ½mgh

An inelastic collision differs from an elastic collision primarily because:

• Momentum is not conserved

• Objects stick together after collision

• Total energy is created

• Mass changes during collision