A skateboarder with mass ms = 36 kg is standing at the top of a ramp which is hy = 3.4 m above the ground. The skateboarder then jumps on his skateboard and descends down the ramp. His speed at the bottom of the ramp is vf = 6.1 m/s. Write an expression for the work, Wf, done by the friction force between the ramp and the skateboarder in terms of the variables given in the problem statement.

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr