How much work? Given speeds and mass

[ital_dj]

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.

 

[Snazzy]

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.

 

[ital_dj]

But still, how would I solve for d?

 

[Snazzy]

Use kinematics to solve for a and d simultaneously.

 

[magda3227]

W = delta(KE)

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