collisions

Momentum in a closed system before and after collision?

the total momentum before a collision or event is equal

to the total momentum after

closed system

A closed system is one in which no external forces from outside the system act on the system and no matter is exchanged from or to the system

Identify the correct equation that expresses the conservation of momentum:

The conservation of momentum states that in a closed system, the total momentum before a collision or event is equal to the total momentum after
∙   ∙ So we want to write the total momentum before the collision/event on one side, and the total momentum after the collision/event on the other side
∙   ∙ In equation form: total momentum before=total momentum after
∙   ∙ Where total momentum before=pRB⁢E⁢F⁢O⁢R⁢E+pBB⁢E⁢F⁢O⁢R⁢E​​
∙   ∙ And total momentum after=pRA⁢F⁢T⁢E⁢R+pBA⁢F⁢T⁢E⁢R​​
∙   ∙ Which gives: pRB⁢E⁢F⁢O⁢R⁢E+pBB⁢E⁢F⁢O⁢R⁢E=pRA⁢F⁢T⁢E⁢R+pBA⁢F⁢T⁢E⁢R

equation for linear momentum

p=mv

“An object at rest will have a momentum of —⁢—⁢—⁢—⁢—⁢———————

0 kgms-1

An inelastic collision is a collision where:

Momentum is conserved, but kinetic energy is not conserved

perfectly inelastic collision is a collision where:

Momentum is conserved and the objects stick together after the collision

perfectly elastic collision

a collision where both momentum and kinetic energy are conserved

Linear Momentum

A vector quantity. P = mv where P = momentum (in kgms-1), m = mass (in kg), v = velocity (ms-1). Momentum is a vector quantity

Conservation of Momentum

In a closed system, the total momentum before a collision or event is the same as the total momentum after.