Reference no: EM132591347

1. A skier slides down a perfectly frictionless slope, then enters a rough flat ski-track and eventually stops. Discuss how energy changes from one form to another and name the types of energy involved during the skier's trip.

2. Suppose you need to remove an old rusted-on nut. Why is a wrench with a long handle more helpful than one with a shorter handle?

3. The Universal Law of Gravity states that the force of gravity acts between all objects. Nonetheless, you never feel that the fridge in your kitchen pulls you toward it. Why?

4. You aim a rifle horizontally in a perfectly flat field while your friend holds a bullet at the same height as your rifle. You fire the rifle and your friend simply opens her hand simultaneously, allowing the bullet to drop. Your friend claims that both bullets hit the ground at the same moment. Do you agree? Justify your answer. Ignore air resistance.

5. Is this sentence correct: "Even a tiny speck of table salt contains billions of salt atoms"? If not, how would you correct the sentence?