A boy and his skateboard have a combined mass of 60kg. After an initial shove, the boy starts coasting at 5.5m/s along a lever driveway. Friction brings him to a stop in 5.0 s. If the combined force of gravity on the boy and skateboard is 590 N, what is the average coefficient of (rolling) friction between the driveway and the skateboard wheels?

The necleus of an atom is made up of what subatomic particles?

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d

What are some properties of transverse waves?