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## Homework Statement

A 240gram toy car is driven by an electric motor that has a constant power output. The car can climb a 24° incline at 16m/s and can travel on a horizontal table at 39m/s. The frictional force retarding the motion is kv, where k is a constant and v is its speed. How steep an incline can it climb with a speed of 28m/s?

## The Attempt at a Solution

I've tried solving this for 2 days now and but not succeeded. It seems quite simple but it is the kv part that I don't know how to use.

Please could someone explain how to solve it?

Help is very much appreciated!

Thank you!