Unit 3 Final Review

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.

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

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

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.

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.

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

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

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

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.

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