While you are sitting on a chair at the edge of a 1.8-m-deep swimming pool, your eyes are 1.4 mabove the surface of the water. You see an acorn on the bottom of the pool at a 45? angle below the horizontal.
What is the horizontal distance between you and the acorn?
d =

d=2.55m

Explanation:

This is a right angle triangle opp/ hyp = sin45

1.8/d = sin45

d sin45=1.8

d= 1.8/sin 45= 1.8/0.7071 = 2.55m

pe = weightxheight = 2000x1000=2,000,000joules

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )