Force

Question 1

mass

Answer 1

quantitative measure of an object’s inertia, in kg

Question 2

weight

Answer 2

gravitational force an object experiences when near a much larger body such as earth, in N
=mg

Question 3

Newton’s first law

Answer 3

law of inertia: object in state of rest or motion will stay in that state unless acted upon by a net force

Question 4

Newton’s 2nd law

Answer 4

F=ma

Question 5

Newton’s 3rd law

Answer 5

for every action there is an equal and opposite reaction

Question 6

Newton’s law of universal gravitation

Answer 6

every mass in the universe exerts an attractive force on every other mass in the universe, the force is proportional to both of the masses and inversely proportional to the square of the distance r between their centers of mass

F=Fm1m2/r^2

Question 7

force due to gravity and the normal force of an incline plane is always equal to …

Answer 7

mgsin(theta), points directly along the plane

Question 8

normal force for incline plane

Answer 8

mgcos(theta)

Question 9

centripetal acceleration

Answer 9

velocity remains constant but direction continually changes at constant rate, always points toward center of circle
a_c = v^2/r

Question 10

centripetal force

Answer 10

net force from centripetal acceleration, points towards center
F_c = mv^2/r

Question 11

2 types of friction

Answer 11

static - between two surfaces not moving

kinetic- when moving

Question 12

force of friction =

Answer 12

coefficient of friction x normal force

Question 13

Hooke’s law

Answer 13

F = -kdetla(x)

springs

Question 14

centrifugal force

Answer 14

the effect of centripetal force viewed from a different frame of reference