Question

A cyclist is travelling with speed 18m per second. The cyclist stops pedaling and comes to rest without breaking due to resistance forces totalling 120 Newton. Describe one limitation in this model?

Find the time for cyclist to stop.  
Find the distance the cyclist travels before stopping.

Answer 1

Can't be possible to answer.

Explanation:

First of all, The main limitation of the model is, there is no mass given for the cyclist and the cycle.

So, We can't find the deceleration of the cycle, so We can't apply laws of motion here.

Hope this helps. And If you want to answer this question, you have to include the total mass of the cyclist with the cycle.