[[Inertia]] resistance to move causes momentum

Stay in motion

greater Mass greater inertia and greater speed greater inertia

Trucks are harder to stop than birds

$$P = mv$$

Momentum = mass x velocity

Object in motion tends to stay in motion

Impulse

• Change in momentum
• = final - initial momentum
• Changes due to force
• = Force x Time

Conservation of Momentum

• Net initial momentum = final momentum
• ![[Conservation of Momentum.png]]
• Cannon and cannonball example
  • Net initial momentum is 0 because cannon and ball aren't moving
  • after the cannonball is shot out at 500kg/s, the cannon has to have the same momentum but negative (other direction)
  • Thats why cannon is heavier