Where does the heat for geothermal energy come from? a. from the moon b. from warm sections of the ocean c. from underground d. from the sun

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

In what direction does an applied force move an object

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.)