Newton's second law:
A cyclist competes in a one-lap race around a flat, circular course of radius 140m. Starting from rest and speeding up at a constant rate throughout the race, the cyclist covers the entire course in 60s. The mass of the bicycle (including the rider) is 76kg.
A. Find Ff,net, the magnitude of the net force acting on the cyclist at the finish line. Express your answer in newtons to two significant figures.
B. To asses wheter your calculations make sense, let's simplify the problem even further and assume air resistance is negligible. In this case, the net force acting on the bicyclist is equivalent to just the force of static friction, and your answer to Part D is the magnitude fs. Based on this value, what is the minimum coefficient of static friction μs between the race track and the bicyle? Express your answer numerically to two significant figures.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Circular Motion concept. You can view video lessons to learn Circular Motion. Or if you need more Circular Motion practice, you can also practice Circular Motion practice problems.