50. as a pendulum swings back and forth,
a) potential energy is transformed into kinetic energy
b) kinetic energy is transformed into potential energy
c) at the lowest part of the swing the potential energy is the lowest
d) all of the above are true

The discovery of the electron as a subatomic particle was a result of

What is the single most important equation in all of physics?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)