A4 kg bowling ball rolls at a speed of 5 m/s on the roof of a building that is 30 meters tall. what is its kinetic energy?

a. 10 j
b. 50 j
c. 120 j
d. 1,176 j

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire