chapter 3 ML&M

Question 1

the change in momentum of an object is equal to the

Answer 1

impulse that acts on it

Question 2

the conservation of momentum is most closely related to newton’s

Answer 2

3rd law

Question 3

whereas impulse involves the time that a force acts, work involves the

Answer 3

distance that a force acts

Question 4

if you push for an hour against a stationary wall, you do not work

Answer 4

on the wall

Question 5

when you push an object a certain distance while applying twice the force, you do

Answer 5

twice as much work

Question 6

an object may have potential energy because of its

Answer 6

location

Question 7

a ball rolling down an incline has its maximum potential energy at

Answer 7

the top

Question 8

a pulley system can

Answer 8

multiply a force and change the direction of a force

Question 9

when a simple machine multiplies force, it decreases

Answer 9

distance moved