Two students climb the ladder up the 25m high light towers at the football field.  Alex weighs 80kg, but can generate {635} W of power. How long does it take Alex to climb to the top? Zeb weighs 90 kg, but can generate 750W.  Does Z make it up to the top faster or slower than A?  Justify your answer with calculations.   While they are up at the top, Zeb finds a 5 kg bowling ball.  How much potential energy does it have?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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  1. Two students climb the ladder up the 25m high light towers at the football field.  Alex weighs 80kg, but can generate {635} W of power.
    1. How long does it take Alex to climb to the top?
    2. Zeb weighs 90 kg, but can generate 750W.  Does Z make it up to the top faster or slower than A?  Justify your answer with calculations.  
    3. While they are up at the top, Zeb finds a 5 kg bowling ball.  How much potential energy does it have?
    4. Zeb drops the bowling ball.  Neglect air resistance.  How fast is it moving when it hits the ground?
    5. Instead of hitting the ground, it hits a trampoline that compresses by 0.70 meters.  What is the spring constant of the trampoline?
    6. Give TWO real world reasons why the bowling ball will not bounce all the way back up to Zeb.
    7. Alex finds and drops a 6 kg bowling ball.  Compare the time it takes to hit the ground with the time that Zeb’s ball takes and explain.
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