Analyze an uphill skier problem using work, energy, and power principles. See how gravitational potential energy, applied force, and friction determine the required work and power, and learn how speed ...

Solving Problem 1 on work and energy from an old physics final exam. Follow the step-by-step reasoning behind classic work–energy principles and see how foundational physics problems were approached ...

We walk here, we walk there, we walk everywhere. Maybe you’re headed to work or to lunch in a busy city. You’re expending energy, and the exercise is good for you. But what if, on top of that, we ...