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 At which point shown would the ball in the image above have the largest kinetic energy?

    When a glass rod is rubbed with a piece of vinyl, the glass becomes  positively charged. Why?

A pendulum, shown here, is swinging back and forth without any friction in the system. Image Description A diagram of a pendulum swinging with locations marked. Point A is when the pendulum is on the far left. Point C is when the pendulum is at the bottom of its arc. Point B is in the middle of point A and point C. Use this pendulum to answer the next two questions.

In the following questions a beginning skier starts standing still at the top of a run. He then starts down the hill speeding up as he goes. When he is going as fast as he wants, he angles his skis (snowplows), keeping his speed constant. Finally, he reaches a flat, level portion of snow at the bottom of this run.     

At which of the points would the net force on the skier be zero?

What happens to the total charge in the universe as a result of charging the glass rods?

When the James Webb telescope unfolds, what happens to its angular momentum?

I have read and will follow the rules listed above. I have neither  given nor received any help from another person, with the possible  exception of one of the class instructors or TAs, in completing this test.

The James Webb telescope, the Hubble successor that is due to launch shortly, is designed so that it folds up for launch and unfolds to a much larger size after it is released in space. It is shown in both its folded and unfolded configurations below.    The James Webb will be rotating slightly when it is deployed in space. What will happen to its rotational speed as it unfolds to its larger size?

The article about car safety features explained how they protect the occupants of vehicles. Which of the following statements correctly applies that information to the passengers in the small car during the car-truck accident described above?