A competition-cyclist closing the goal. Towards the end-rush she raises her speed from 12m/s to 20m/s on 6.5s. The Cyclist and the cycles masses are together 70kg. Calculate acceleration The accleration is 1,23 no problem i calculated that but the next question is hard.(adsbygoogle = window.adsbygoogle || []).push({});

The Cyclist pushes forward a power of 150N. How much power is pushing backwards. Which types of powers are there?

How shall i Calculate the power backwards here?

To the second problem....

A person who weights 76,5kg hangs up in a helicopter with a line. Which powers utilizes the person and how big are theses powers.

a) In the beggining when the acceleration is 1,3m/s^2

b)When the speed is constant with 2.0m/s

c)On the top, where the acceleration is -1,3m/s^2

How do i calulate this? My mind stands still... please help me

Thanks

Izekid

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# Homework Help: 2 Hard Problems Homework

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