Aball is thrown straight up at 15m/s. how long does the ball take to reach apex? what is the ball's total time of flight?

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?