6.What is power?
A.work per unit time
B.force per unit distance
C.total energy used
D.force over a time interval

7.What is kinetic energy?
A.stored energy
B.energy of friction
C.energy of motion
D.energy stored in chemical bonds

8.When a rollercoaster cart falls towards the ground,what happens to it's potential energy?
A.increases
B.descreases
C.stays the same
D.nothing happen

9.In order for work to be done,what must be true?
A.force acts in the same direction as the distance travelled.
B.force and distance are in opposite directions.
C.force is greater than distance.
D.distance is greater than force.

10.Which point on the pendulum (right side) has the greatest PE?
A.A
B.B
C.C
D.D​