Two students are on the roof of a building 29.4 m above the street. One student throws a rock vertically downward at 4.9 m/s. At the same time, the other student throws a ball vertically upward at 4.9 m/s. The second ball misses the roof on its way down. a) Calculate the difference in the time the rocks spend in the air.
b) Calculate the velocity of each rock as it strikes the ground.
c) Calculate the distance between the rocks 0.5 seconds after they are thrown.

What causes the formation of ocean currents?

What is a subatomic particle with a negative charge and very little mass?

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?