Which one of the following bodies has only potential energy?
a. a cat sitting on the fence
b. a stone falling from a cliff
c. a ball rolling downhill
d. a dog running after a car

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.