Question

A 70 kg bicyclist rides his 9.8 kg bicycle with a speed

Answer 1

Answer:

Hello,

QUESTION)

✔ We have Ek = 1/2m x v²

• Ek = 1/2 x 79.8 x 16²
• Ek = 10 214.4 J

In order to come to a complete stop, the cyclist must convert all his kinetic energy into thermal energy. Given that the braking force opposes movement, the work is therefore resistant, i.e.  W = -10 214.4 J.