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5th grade sci Ch 4
5th grade science chapter 4
Question | Answer |
---|---|
non-contact force | a force that acts at a distance |
force | a push or pull that acts on an object |
gravity | the force of attraction between any two objects |
contact force | a force that requires two pieces of matter to touch |
acceleration | the rate at which the speed or direction of motion of an object changes over time |
friction | the force that results when two materials rub against each other or when their contact prevents sliding |
uniform motion | motion without acceleration |
Newton’s second law of motion | the greater the mass of the object, the smaller its change in motion will be for a given force |
Newton’s first law of motion | an object will stay in uniform motion unless a net force acts on the object |
Inertia | the tendency of an object to resist any change in motion |
Newton’s first law of motion | an object will stay in uniform motion unless a net force acts on the object |
Air resistance | the force exerted by the air on things moving through it |