Energy and Momentum - DOK 2-4 Questions

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.

Front

How does mass affect momentum?

Back

An increase in mass results in a proportional increase in momentum, assuming velocity remains constant.

Front

What is the principle of conservation of momentum?

Back

In a closed system, the total momentum before a collision is equal to the total momentum after the collision.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv².

Front

How is kinetic energy related to momentum?

Back

Kinetic energy can be expressed in terms of momentum: KE = p²/(2m).

Front

What happens to momentum in elastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved.

Front

What happens to momentum in inelastic collisions?

Back

In inelastic collisions, momentum is conserved, but kinetic energy is not.

Front

What is an example of a perfectly inelastic collision?

Back

A perfectly inelastic collision occurs when two objects collide and stick together, such as two balls of clay colliding.

Front

How does water resistance affect a diver's momentum?

Back

Water resistance decreases the diver's momentum as they enter the water, due to the opposing force.

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as Impulse = Force × Time.