Chapter 6 Section 3 Inertia & Momentum Unit 2 Force & Motion Chapter 6 Section 3 Inertia & Momentum

Reminder… mass - the amount of matter in an object the standard unit is kilogram (kg) many factors, like mass, affect an object’s motion

Which is More Difficult? Why?

Inertia the greater the mass of an object the more difficult it is to speed up, slow down, or turn inertia - tendency of an object to resist a change in motion (more mass = more inertia = harder to change motion)

Like increasing mass, increasing speed or velocity makes it harder to move an object… movement could be starting or STOPPING momentum - a measure of how difficult it is to stop an object depends on mass and velocity of the object

momentum = mass x velocity Calculating Momentum momentum = mass x velocity   OR p = mv standard unit: kilograms times meters per second (kg • m/s) since velocity includes a direction, momentum includes direction too  mass, velocity, or both =  momentum

Conservation of Momentum law of conservation of momentum - the total momentum of objects that collide is the same before and after the collision can be used to predict how the motions/speeds of objects will change after a collision 2 collision possibilities… stick together bounce off each other