Author Question: A solid block of metal in electrostatic equilibrium is placed in a uniform electric field. Give a ... (Read 134 times)

strangeaffliction · **on:** Jul 29, 2018

A solid block of metal in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interior.

A)

The interior field points in a direction opposite to the exterior field.
B)

The interior field points in a direction that is at right angles to the exterior field.
C)

The interior points in a direction that is parallel to the exterior field.
D)

There is no electric field in the block's interior.
E)

Not enough information is given to make a statement concerning the elecric field on the block's interior.

Question 2

Discuss the various energy conversions that occur when a person performs a pole vault. Include as many conversions as you can, and consider times before, during, and after the actual vault itself.

What will be an ideal response?

jrpg123456 · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

D

Answer to Question 2

The jumper's initial kinetic energy is largely converted to a compressional, spring-like potential energy as the pole bends. The pole straightens out, converting its potential energy into gravitational potential energy. As the jumper falls, the gravitational potential energy is converted into kinetic energy, and finally, the kinetic energy is converted to compressional potential energy as the cushioning pad on the ground is compressed.