7. Through the process of doing work, energy can move between the environment and the system as the result of
a. forces
C. momentum
b. matter
d. impulse
8. If the environment does work on the system, the quantity of work is
a. negative
C. Zero
b. positive
d. undetermined
9. If the environment does work on the system, the energy of the system
a. decreases
b. increases
10. If the system does work on the environment the end sy of the system
a. decreases
b. increases
11. In the equation W - Fd, Fd holds only for
c. remains the same
d. cannot be determined
C. is undetermined
d. remains the same
forces exerted in the direction of displacement
C. gravitational
d. positive
a. constant
b. frictional
12. In the equation W = Fd cos , angle is the angle between F and the
a X-axis
b. y. axis
c. direction of the displacement
d. vertical direction