A roller coaster features a hill drop followed by a short, level, horizontal track. On the level track, the initial Eg has been converted to: a)Ek
b) Ek and remaining Eg
c) No energy has been converted yet
d) Ek, remaining Eg, Sound Energy, Heat Energy

What happens to the velocity of the car when the upward pull of the cable is greater than the downward pull of gravity as the car rises toward the top?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves