# How much work? Given speeds and mass

## Homework Statement

How much work is done by an Olympic triathlete who accelerates herself on her bicycle (combined mass of 105kg) from 5m/s to 10m/s

## Homework Equations

W = mg$$\Delta$$d

## The Attempt at a Solution

Tried solving for d, and plugging in.

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Your equation would apply if there was gravitational energy involved, but in this question there isn't. Work here is defined as W = Fd where F = ma.

But still, how would I solve for d?

Use kinematics to solve for a and d simultaneously.

W = delta(KE)

All you need to do is subtract her final kinetic energy from her initial kinetic energy to find the answer.