(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A bicyclist coasts down a 6.0 degree hill at a steady speed of 4.5 m/s.

Assuming a total mass of 60 kg (bicycle plus rider), what must be the cyclist's power output to climb the same hill at the same speed?

2. Relevant equations

Newton's 1st law

P=W/t

3. The attempt at a solution

[tex]P=\frac{W}{t}=F \cdot v[/tex]

Set x-axis along incline...

[tex]F-mg\sin\theta=0[/tex]

[tex]F=mg\sin\theta[/tex]

[tex]P=mg\sin\theta*4.5 = 276.6 W[/tex]

To 2 sigfig = 280 W

Is this correct? I'm being told it is the wrong answer...

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# Homework Help: Power - biking uphill

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