Discussion-10

# Discussion-10 - Work WorkandEnergy Discussion#10 Ch.6.1 6.3...

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ork and Energy Work and Energy Discussion #10 – Ch. 6.1 – 6.3 Physics 125–Fall 2010 Dr. Mike Melnichuk Office: 2409 Randall Lab ffice Hours: 2:00 :00 / Mon Rm 1416 Randall Lab in Rm. 1416 Randall Lab.

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Example #1 To pull a 50-kg crate across a horizontal frictionless floor, a worker applies a force of 210 N, directed 20° above the horizontal. The crate then moves 3.0 m. As the crate moves 3.0 m, what work is done on the crate by the worker’s force? A. 420 J B. 351 J C. 590 J D. 674 J E. 780 J
Test #1 To pull a 50-kg crate across a horizontal frictionless floor, a worker applies a force of 210 N, directed 20° above the horizontal. The crate then moves 3.0 m. What is the net (total) work done on the crate (by all forces)? A. 420 J B. 351 J C. 590 J D. 674 J E. 780 J

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Example #2 A frightened child is restrained by her mother as the child slides down a frictionless playground slide. If the force on the child from the mother is 100 N up the slide, the
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Discussion-10 - Work WorkandEnergy Discussion#10 Ch.6.1 6.3...

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