Describe what happens when a positively charged rod is brought close to but doesn't touch a neutral pith ball. Explain why this happens. (Include whether the ball is attracted, repelled or neither to the rod. Explain what is happening to the electrons in the pith ball)

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?