A skateboarder with a mass of 104 kg enters a ramp with a height of 7 m. Assume a frictionless surface (no friction and no thermal energy). How fast
will the skateboarder be moving at the bottom of the ramp?

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

An object has a weight of 500 on earth what is the mass of this object

What properties of a moving object are used in determining the object's energy of motion