I pull my child in a sled over the snow. The rope makes an angle with the horizontal so that the pulling force has a horizontal component of 15 N and a vertical component in the upwards direction 25 N . The combined weight of the child and sled is 95 N . I'm getting tired and so the sled is slowing at a constant rate of 0.80 m/s each second.

you would expect a sound wave to speed up. - b)

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                                         : )

double the distance = divide strength by 4