A ball drops some distance and loses 30 j of gravitational potential energy. do not ignore air resistance. how much kinetic energy did the ball gain?

The NET force on a rock that weighs 2 N when you hold it at rest above your head is?

If a spacecraft is pushed by a thruster, what will happen A, The spacecraft will move and then slowly come to a stop on its own. B. The spacecraft will not move because it only works on earth. C. The spacecraft will not move due to air resistance. D.

An electron is ejected horizontally at a speed of 1.5 ✕ 106 m/s from the electron gun of a computer monitor.

What cloud brings thunderstorms and lightning?

A woman (m = 45kg) is kneeling on the shoulders of a man (m = 70kg) in pair figure-skating while both are traveling at 1.5 m/s. The man gracefully accelerates the woman forward into the air.

A battleship simultaneously fires two shells toward two identical enemy ships. One shell hits ship A, which is close by, and the other hits ship B, which is farther away. The two shells are fired at the same speed.

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.

What are the components of earths life support system

A car is moving with a velocity (3.0 m/s) € x ˆ + (1.0 m/s) € y ˆ and 3.0 seconds later its velocity is (6.0 m/s) € x ˆ - (3.0 m/s) € y ˆ. What is the direction of the average acceleration of the car?