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Newton 3/Momentum
Term | Definition |
---|---|
2 factors that affect gravity | mass and distance |
2 factors that affect momentum | mass and velocity |
acceleration due to gravity | acceleration of a falling object in freefall is about 9.8m/s^2 |
centripetal acceleration | acceleration towards the center of a curved or circular path |
centripetal force | net force exerted toward the center of a curved path |
formula for momentum | mass x velocity; p = mv |
freefall | when all forces except gravity acting on a falling object can be ignored |
gravity | attractive force between any two objects; depends on the masses of the objects and the distance between them |
horizontal motion | <----> |
How Seatbelts work | All three of Newton's Laws explain how seatbelts work; 1st: Your body will stay in motion during a crash unless the seatbelt stops you |
Law of Conservation of Momentum | momentum can be transferred from one object to another when they collide but it cannot be created or destroyed |
Law of Universal Gravitation | the gravitational force between two masses decreases rapidly as the distance between the masses increases |
momentum | how much force is needed to change an object's motion; the product of an object's mass and velocity |
momentum of an object at rest | zero |
Newton's Third Law of Motion | action/reaction; when one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction |
projectile motion | projectiles follow a curved path due to gravity |
units for momentum | kg x m/s |
vertical motion | | |
weight vs. mass | weight increases as mass increases |
Work | using a force to move an object a distance (when both the force and the motion of the object are in the same direction.) |
friction | the force that opposes the sliding motion of two surfaces that are touching each other |