force Flashcards
1
Q
equation for force
A
F=ma
2
Q
what is newtons 1st law
A
An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
3
Q
newtons 2nd law
A
force is equal to the change in momentum overtime
4
Q
newtons 3rd law
A
For every action, there is an equal and opposite re-action
5
Q
what two attributes does force have
A
magnitude and direction
6
Q
what is net force
A
combination of all forces on an object
7
Q
what is friction
A
a force that opposes motion between surfaces because of contact
8
Q
when does kinetic friction occur
A
between moving surfaces
9
Q
when does static friction occur
A
between stationary surfaces
