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?

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Does anyone have the answers to online physics course plato course physics, semester a v3.0

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?