Ferris wheel has a diameter of 76 m and completed one revolution every 20 min. a)Calculate the tangential speed the car
b) Calculate the magnitude to the centripetal acceleration of one of the car.

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Which subatomic particle has a negative charge

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.