Answer to Question #115794 in Physics for Sarah

Question

At the lowest point on the ramp, the skateboarder is travelling at a constant speed along a path which is part of a vertical circle.State that direction on the resultant force on the skateboarder at this point

Answer 1

Of the skater travels at a constant speed, the direction on the resultant force cannot be identified: the normal force acts upward, the centripetal force acts upward, the force of gravity acts downward. Since the skater does not move in vertical direction at this point, all forces are at equilibrium.