Problem $14\mathrm{.}47$

An escalator is moving forward and upward with a speed of $\backslash (2\backslash$mathrm$\{$ft$\}/\backslash$mathrm$\{$s$\}\backslash ).$

Part A

If the steps are $\backslash (8\backslash$mathrm$\{$in$\}\backslash ).$ high and $15$ in $.$ in length, determine the required horsepower of a motor needed to lift an average load of $170$ lb per step. The escalator rises to a height of $20$ ft from the floor.

Express your answer in horsepower to three significant figures.

Incorrect; Try Again; $4$ attempts remaining