Momentum

Momentum = Mass * Velocity

A boy in a 500-kg car tosses a 1-kg toy into the air. The car is traveling at 4 m/s. What is the momentum of the toy in the horizontal direction?

Momentum = M * V

P = MV

P = 1*4

P = 4 kg*m/s

The 500 kg car is traveling at 4 m/s. What is the momentum of the car in the horizontal direction?

Momentum = M * V

P = MV

P = 500*4

P = 2000 kg*m/s

MV = MV + MV + MV, etc.

A father pushes against his daughter. His mass is 80 kg. Her mass is 20 kg. If he moves in one direction at 0.5 m/s, How fast does she move in the opposite direction?

MV = MV

80*0.5 = 20*V

40 = 20V

V = 40/20

V = 2 m/s

What is the difference between inertia and momentum?

Inertia is proportional to mass. Large masses have more inertia than smaller masses.

Inertia is a property of mass and cannot change.

Momentum = mass x velocity

Momentum changes as an object changes its velocity. Momentum is conserved.

Law of Conservation of Momentum = "In a system consisting of bodies on which no outside forces are acting; the total momentum of the system remains the same."

Momentum can be transferred from one object to another.

In an interaction, the momentum lost by one mass equals the momentum gained by the other.

Total Momentum before interaction = The Total Momentum after.