A70kg runner begins his slide into second base while moving at a speed of 4m/s. the coefficient of friction between him and the ground is .7. he slides so his speed is 0 just as he reaches the base. how much work is done by friction?

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?