Newton's Third Law Flashcards
when an object applies a force on another object, the second object applies a force of the same strength on the first object, but the force is in the opposite direction
Newton’s Third Law
the forces two objects apply to each other
force pair
why do force pairs not cancel each other out?
each force is applied to different objects
what are the two parts of a force pair
action-reaction
the first force applied to an object
action force
the equal and opposite force
reaction force
swimmer pushing against water - ?
water pushing back - ?
action
reaction
Because action and reaction forces do not cancel, they can ___________ the _____________ of objects.
change, motion
a measure of how hard it is to stop a moving object
momentum
Momentum of an object is in the ___________ direction as its velocity
same
total momentum of a group of objects stays the same unless outside forces act on the object
law of conservation of momentum
If objects collide and stick together, the collision is considered ___________.
inelastic
If objects collide and bounce apart, the collision is considered ___________.
elastic
