Question

A soccer ball is kicked from the top of one building with a height of H1 = 27.4 m to another building with a height of H2 = 11.1 m. (It is not a very smart idea to play soccer on the roof of tall buildings.) The ball is kicked with a speed of v0 = 17.70 m/s at an angle of θ = 78.3° with respect to the horizontal. The mass of a size 5 soccer ball is m = 450 g. When the ball lands on the other building, its speed is 20.66 m/s. How much energy was lost to air friction? The ball is kicked without a spin.

Answer 1