- #1

chrismeng

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## Homework Statement

An object initially at an elevation of 5 m relative to the Earth's surface with a velocity of 50 m/s is acted on by an applied force R and moves along a path. Its final elevation is 20 m and its velocity is 100 m/s. The acceleration of gravity is 9.81 m/s^2. Determine the work done on the object by the applied force, in kJ.

## Homework Equations

Work of all non-gravity forces = Change in KE + Change in PE

## The Attempt at a Solution

I can get the work done by R in terms of the mass using the equation

Work of all non-gravity forces = Change in KE + Change in PE

but the problem doesn't tell us the mass and I don't know what other equation to use to set up a system of equations to eliminate the mass.