7. No work is done by gravity on a bowling ball that rolls along a bowling alley because

4. A 2 kg mass is released from rest 5 m above the ground. With what speed will it strike the ground, neglecting air resistance?

14.  A machine puts out 100 W of power for every 1000 W  put into it. The efficiency of the machine is

2.  Two kids slide from the same height down different water slides. One slide is at a steep angle and the other is of a gradual slope. Which child will reach the bottom with the greatest speed?

13. An object placed 1/2 way between the Earth and the Moon  will fall toward

8. When a car brakes to a stop, its kinetic energy is transformed to

You are Gram staining the highly infectious organism Mycobacterium tuberculosis but are unable to view the cells under the microscope. Why?

12. A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of 

3.  An object has potential energy may have this energy because of its 

This lateral tib/fib was taken with the leg: