A 50-kg athlete is moving at 5 m/s on a frictionless surface. Which force is responsible for the change in her kinetic energy?
Q1. A 50-kg athlete is moving at 5 m/s on a frictionless surface. Which force is responsible for the change in her kinetic energy?
Answer: Non-conservative force
Explanation: Non-conservative force causes increase in kinetic energy. Conservative force is force in conservative field, so it can only change potential energy.