You throw a $5\mathrm{.}5$ gg coin straight down at $4\mathrm{.}0$ m$/$sm$/$s from a $30-$mm$-$high bridge.

Part A

How much work does gravity do as the coin falls to the water below?

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

WW $=$

nothingnothing

SubmitRequest$$Answer

Part B

What is the coin's change in kinetic energy?

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

KK $=$

nothingnothing

SubmitRequest$$Answer

Part C

What is the speed of the coin just as it hits the water?