Unit 3 Final Review

Front

What is momentum?

Back

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

Front

How is momentum conserved in a closed system?

Back

Momentum is conserved in a closed system when the net external force acting on the system is zero.

Front

What factors affect the momentum of an object?

Back

The momentum of an object is affected by its mass and velocity; increasing either will increase momentum.

Front

What is the relationship between force, time, and momentum?

Back

The change in momentum of an object is equal to the force applied multiplied by the time duration of the force, expressed as F = Δp/Δt.

Front

What happens to momentum when two objects collide?

Back

In a collision, the total momentum of the two objects before the collision is equal to the total momentum after the collision, assuming no external forces act on them.

Front

What is the difference between elastic and inelastic collisions?

Back

In elastic collisions, both momentum and kinetic energy are conserved. In inelastic collisions, momentum is conserved, but kinetic energy is not.

Front

How does a light spring affect collision safety?

Back

A light spring provides a safer collision by extending the time over which the collision occurs, reducing the force experienced.

Front

What is the formula for calculating momentum?

Back

The formula for calculating momentum is p = mv, where p is momentum, m is mass, and v is velocity.

Front

What is the effect of dropping an egg into water versus onto a hard surface?

Back

Dropping an egg into water results in less force and more time to come to a stop, preventing it from breaking, while dropping it onto a hard surface results in more force and less time, causing it to break.

Front

What is the significance of net force in momentum conservation?

Back

The net force must be zero for momentum to be conserved; if there is an unbalanced force, momentum will change.