Several physical situations are described below. For each situation, simplify the work-energy equation by canceling any zero terms and any energy terms (whether KE or PE) which are unchanging. Explain each term which gets canceled.
A Hot Wheels car starts from rest on top of an inclined plane and rolls down the incline through a loop and along a horizontal surface. Friction and air resistance have a significant effect on the car.
Simplification of Work-Energy Equation
KEi + PEi + Wnc = KEf + PEf
From the energy conservation, the initial energy of a system and the work done (Wnc) by non-conservative forces on the system must equal the final energy of the system.
Thus, the expression for energy conservation is,
Step by step
Solved in 2 steps with 2 images
