A 25-g ball is released from rest 80 m above the surface of the Earth. Just before it hits the surface its speed is 20 m/s. What is the change in energy of the ball during its fall?

The change in energy of the ball during its fall is 14.6 Joules.

Explanation:

Given that,

Mass of the ball, m = 25 g

It is released from rest 80 meters above the surface of the Earth, h = 80 m

Just before it hits the surface its speed is 20 m/s, v = 20 m/s

We need to find the change in energy of the ball during its fall. The potential energy gets converted to its kinetic energy. The change in energy is given by :

So, the change in energy of the ball during its fall is 14.6 Joules.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.