Question

Consider the skateboarder in the figure below. If she has a mass of 49 kg, an initial velocity of 24 m/s, and a velocity of 15 m/s at the top of the ramp, what is the work done by friction on the skateboarder? Ignore the kinetic energy of the skateboard's wheels

Answer 1

Use Conservation of Energy. Here's a few equations that you'll need to use:
\[K = 1/2mv ^{2}\]
\[U = mgh\]
\[K _{i}+U _{i}=K _{f}+U _{f}+\Delta T\]
Use these equations and solve for \[\Delta T\]

Answer 2

thank you