forces 2

• inertia is the tendency for motion to remain unchanged
• an object’s inertial mass measures how difficult it is to change the velocity of an object
• acceleration = change in speed / time
• newtons 3rd law : when two objects interact the forces they exert on to each other are equal and opposite
• momentum = mass x velocity
• total momentum before collision = total momentum after collision
• forces cause the momentum of an object to change
• force = mass x acceleration