physics lap 2 test

force

a push or a pull exerted by some agent on some object

vectors

directions ( can combine to make larger or smaller overall effects)

4 natural forces

gravity, weak nuclear force, electromagnetic force, strong nuclear force

Normal force

supports the weight of am object

tension

points along rope to center as a result of being stretches

friction

force that opposes motion

Net force

sum of all forces acting upon an object

Newtons first law

an object in motion stays in motion, an object at rest stays at rest, unless acted upon by an outside non-zero force

inertia

the tendency of an object to resist a change in motion unless an outside force acts on the object

an object accelerating means

Fnet≠0→forces not balanced

constant velocity
or @ rest

Fnet=0→forces are balanced→equilibrium

free body diagrams

drawing forces on a picture

How does mass influence acceleration?

acceleration inversely is proportional to mass

increases mass→

acceleration decreases

decreases mass→

acceleration increases

More mass→less acceleration→

harder to move

less mass→more acceleration→

easier to move

How is mass related to inertia?

mass is a measure of inertia

Newtons third law

for every action, there is an equal to opposite reaction