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hps final review 5-6

QuestionAnswer
explain difference between mass and weight mass is the amount of stuff, and weight is the force of gravity on the object.
gravity weakest force, responsible for the force of attraction
electromagnetism second weakest, holds atoms together in the nucleus
weak nuclear force second strongest, responsible for radioactive decay
strong nuclear force strongest, it glues particles together inside the nucleus
factors responsible for variations in gravitational field strength distance from the center of the planet, and the planet's mass.
gravitational field strength force of gravity acting on an object. the force is directly proportional to the mass of the object and the force of attraction.
balanced forces no acceleration. there may be velocity
unbalanced forces there is acceleration
Newtons third law for every action there is an equal and opposite reaction
Newton's first law objects at rest stay at rest, unless acted on by an outside force. objects in motion stay in motion, unless acted on by an outside force
Newton's second law F=ma the acceleration of an object is directly proportional to its mass and the force acted on it.
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