Hakeem throws a 10.50 g ball straight down from a height of, Ask an Expert

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Q. A man pulls a 50.0 kg box at constant speed across the floor with a rope. He applies a 200N force at an angle of 30 degrees. Sum the forces in the x-direction. a) What is the frictional force opposing the motion? b) Sum the forces in the y-direction. What is the value of normal force?

Q. Hakeem throws a 10.50 g ball straight down from a height of 2m. The ball strikes the floor at a speed of 7m/s. What was the initial speed of the ball? Presume that air resistance is negligible.

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