PhysNov4

# PhysNov4 - A 60 kg man hangs from a clock with a potential...

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November 4 physics

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In: Under the influence of a force, an object of mass 4 kg accelerates from 3 m/s to 6 m/s in 8 s. How much work was done on the object during this time? a) 27 j b) 54 j c) 72 j d) 96 j e) cannot be determined
Objective : To learn elastic potential energy Success criteria: Calculate: Work Kinetic energy Work/kinetic energy theorem Gravitational potential energy Elastic potential energy.

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Homework check
Work: A dog pushes a stroller with a force of 50 N for a distance of 120 m. How much work was done?

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Kinetic Energy A baby stroller with a mass of 25 kg has a kinetic energy of 5000 J. How fast is it going?
Work/Kinetic energy theorem A daddy pushes a 30 kg stroller with a force of 300 N for a distance of 20 m. How fast is it going at the end?

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Unformatted text preview: A 60 kg man hangs from a clock with a potential energy of 12,000 J. How far off the ground is he? And now. ..Elastic potential energy http://www.youtube.com/watch?v=Jnj8mc04r9E Work done on a spring: Pe s = ½ k Δx 2 How much work is done to pull back a bow with a force constant of 1000 N/m a distance of .6 meters? A polevaulter’s pole his a k of 800 N/m. He stores 16000 J of potential energy in the pole. How far did he bend the pole? What is the k of a spring that has a potential energy of 40,000 J when it is compressed 3 meters? Synthesis I own/ I don’t Out: Wile E’s shoes each have a k of 60 N/m. He compresses them .3 meters. What is the energy stored in the shoes?...
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## This note was uploaded on 11/18/2011 for the course PHYS 121 taught by Professor Burgeson during the Fall '11 term at BYU.

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PhysNov4 - A 60 kg man hangs from a clock with a potential...

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