4. [2pt] After reaching your seat, you lift your 14.5-kg suit- case up by 1.70 m

Question

4. [2pt] After reaching your seat, you lift your 14.5-kg suit- case up by 1.70 m to put it into the overhead bin. What is now the work done by you on the suitcase? A) 16.68 J B) 24.65 J C) 0.00 J D) 142.25 J E) 241.82 J 5. [2pt] A student lets a skateboard roll down the ramp from the first level of PG5 to the ground level. Another student drops an identical skateboard from the first level to the ground level. Which of the two skateboards has more work done on it by the gravitational force? A) The skateboard on the ramp has more work done by gravitation. B) The gravitational force does the same amount of work on both. C) The dropped skateboard has more work done on it by gravitation.

Explanation / Answer

4.
E) 241.82 J

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5)

B) the gravitational force does same amount of work on both

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