The scale on the horizontal axis is 9 s per division and on the vertical axis 9 m per divi-

sion

position (x 9 m)

3+

1

+ + 1 1

0 1 2 3 4 5 6 7 8 9

time (x 9 s)

What is the time represented by the third

tic mark on the horizontal axis?

Answer in units of s.

When an object is heated it contracts. a. true b. false

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe