three identical balls are thrown from the top of a building, all with the same initial speed. the first ball is thrown horizontally, the second at some angle above the horizontal, and the third at some angle below the horizontal, as in the figure below. neglecting air resistance, rank the speeds of the balls and they reach the ground, from fastest to slowest.

How is the ideal mechanical advantage of a wheel and axle calculated?

Which is not true of alpha radiation? o a. it increases the number of protons. o b. it has a positive charge. o c. it causes transmutation. o d. it is heaviest of the three types

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? a.positive force, balanced force, negative force b.negative force, balanced force, positive force c.positive force, unbalanced force, negative force d. negative force, unbalanced force, positive force