1. At which location does the pendulum have the least gravitational potential energy? Why?

2. A rock with a mass of 500 grams drops to the ground from a height of 30.0 meters. What is the decrease in the GPE of the rock, in joules? Write the equation you will use and show your work!

Point B

Explanation:When it is at the bottom of its swing (arm straight up and down). When it is at its lowest point, Gravity can not pull it down any further. This position also has the most kinetic energy because after it passes the bottom, it goes back up again and loses speed. so when the pendulum is at the bottom it is traveling the fastest it will go.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

grav forces affect all objects magnetic forces affect magnetic objects and electric currents