Chapter 5

Question 1

Friction

Answer 1

force that opposes movement

Question 2

two varties of friction

Answer 2

static, kinetic

Question 3

kinetic

Answer 3

slows an object down, possibly bringing it to rest

Question 4

static friction

Answer 4

prevents an object from moving

Question 5

friction formula

Answer 5

f=uN

Question 6

the force of friction on a sliding object is 10N. The applied force needed to maintain a constant velocuty is

Answer 6

10 N

Question 7

How do you maintain a constant velocity?

Answer 7

force needs to be the same as friction

Question 8

A 10 N falling object encounters 4 N of air resistance, the net force on the object is

Answer 8

6

Question 9

whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to

Answer 9

follow a straight line path

Question 10

What has zero acceleration?

Answer 10

an object at rest, moving at constant velocity, mechanical equilibrium

Question 11

direction of friction

Answer 11

always in the direction that opposes the motion