Question

Multiple Choice. Select the best option. You do not need to show your work. S Two men, Joel and Jerry, push against a wall. Jerry stops after 10 min, while Joel can push for 5.0 min onger. Compare the work they do. A) Both men do positive work, but Joel does 75% more work than Jerry. B) Both men do positive work, but Joel does 50% more work than Jerry C) Both men do positive work, but Jerry does 50% more work than Joel D) Both men do positive work, but Joel does 25% more work than Jerry E) Neither of them does any work 6. A ball drops some distance and loses 30 J of gravitational potential energy. Do NOT ignore air resistance. How much kinetic energy did the ball gain? A) more than 30 B) exactly 30 C) less than 301 Three cars (car F, car G, and car H) are moving with the same velocity when the driver suddenly slams on the brakes, locking the wheels, causing kinetic friction between the wheels and the road. The most 7. massive car is car F, the least massive is car H, and all three cars have identical tires. Which car travels the longest distance to skid to a stop? A) Car F B)Car G C) Car H Di They all travel the same distance in stopping. 8 You are standing on a skateboard, initially at rest. A friend throws a very heavy ball towards you. You can either catch the object or deflect the object back towards your friend (such that it moves away frorm you with the same speed as it was originally thrown). What should you do to MINIMIZE your speed on the skateboard? Catch the ball. the ball. C) Your final speed on the skateboard will be the same regardless whether you catch the ball or deflect the bal 9 A baseball is thrown vertically upward and feels no air resistance. Consider the baseball to be the system. As it is rising A) both its momentum and its mechanical energy are conserved B)j its momentum is not conserved, but its mechanical energy is conserved C) both its momentum and its kinetic energy are conserved Dj its kinetic energy is conserved, but its momentum is not conserved E) its gravitational potential energy is not conserved, buts its momentum is conserved SCORE

Answer 1

None of thew go any wols š less than 301,C と mu "Aga

7 na 羸ン.ug ma all Hhu cars hane sam trave Same distanc in Sho g D

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