A roller-coaster car has a potential energy of 700 kJ and a kinetic energy of 160 kJ at point A in its travel. At the low point of the ride,
the potential energy is zero, and 60 kJ of work has been done against friction since it left point A. What is the kinetic energy of the
roller coaster at this low point?

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same? o a. resistance is directly related to length. ob. resistance is directly related to the square of the length. c. resistance is inversely related to the length. d. resistance is inversely related to the square of the length. reset next

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.

Which best describes the difference between internal and thermal energy?