2. A 38kg child is at the top of a slide that is 2.1m tall. (a) if there is no friction , how fast will they be moving when they reach the bottom of the slide? b) If they lose 250.0J of energy to sound heat and friction , how fast will they be moving when they reach the bottom?

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.