Pretest: Unit 5 A bungee jumper who is about to jump has her energy stored entirely as
gravitational potential energy. After jumping, she bounces up and down. What
has happened to her initial gravitational potential energy when she reaches
equilibrium - that is, when she stops bouncing up and down?
O
A. Some of her initial energy has been transferred to potential energy
in the bungee cord.
B. Friction and air resistance have converted all of her initial energy
to heat and sound.
O c. She has regained all of her initial energy as gravitational potential
energy
O
D. The different energy types (gravitational potential, kinetic, and
spring potential) have balanced.

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.