- #1

Northbysouth

- 249

- 2

## Homework Statement

I'm not particularly confident with my calculations and I would appreciate any feed back.

A) What is the kinetic energy of an object with:

mass = 5lbm

velocity = 200 ft/sec

B) What is the potential energy of an object with:

mass = 5lbm

height = 200ft

g = 32.2 ft/sec

^{2}

C) What is the pressure difference between the top and bottom of a water column that is 15ft high and gravity is 32.2 ft/sec

^{2}

## Homework Equations

KE = 1/2mv

^{2}/g

_{c}

PE = mgh/g

_{c}

## The Attempt at a Solution

A)

KE = 1/2(5 lbm)(200 ft/sec)

^{2}/32.17 ft-lbm/lbf-sec

^{2}

KE = 3.11x10

^{3}lbf-ft

B)

PE = (5 lbm)(32.2 ft/sec

^{2})(200ft)/32.17 ft-lbm/lbf-sec

^{2}

PE = 1001 lbf-ft

C) I'm not quite sure where to start with this one and I would appreciate an guidance.