When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed?

A)

It is zero.
B)

It is less than its initial speed.
C)

It is equal to its initial speed.
D)

It is greater than its initial speed.
E)

Cannot be determined without additional information.


B

Physics & Space Science

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Physics & Space Science

A solid aluminum cube rests on a wooden table in a region where a uniform external electric field is directed straight upward. What can we say concerning the charge on the top surface of the cube?

A) The top surface is neutral. B) The top surface is charged negatively. C) The top surface is charged positively. D) The top surface's charge cannot be determined without further information.

Physics & Space Science