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Physics Ch. test
Ch.3 test
Question | Answer |
---|---|
Newton's third law | every action force creates a reaction force that is equl in strength and opposite in direction |
momentum equation | p=mv |
momentum | the mass if an object multiplied by its speed or velocity |
impulse equation | Ft=mv2-mv1 |
impulse | a change in momentum created by a force exerted over time |
law of conservation of momentum | the total momentum in a system of objects cannot change as long as all forces act only between the objects in a system |
collision | when two or more objects jit each other |
elastic collision | the objects bounce off each other with no loss in the total kinetic energy of the system |
inelastic collision | the objects change shape or stick together, and the total kinetic energy of the system decrases |
the final velocity of two objects | m1v1+m2v2=(m1+m2)v3 |