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# 5th grade sci Ch 4

### 5th grade science chapter 4

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
Created by: t_fowler
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