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Published byNorma Simon Modified over 6 years ago
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Problem 2 While training for breeding season, a 380 gram male squirrel does 32 pushups in a minute, displacing its center of mass by a distance of 8,5 cm for each pushup. Determine the total work done on the squirrel while moving upward (32 times).
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We must calculate the total work done by the squirrel in 32 jumps, then we must apply the law:
L = F x s (Work = force x displacement) In this case the strength corresponds to the force, ie the gravitational attraction of bodies from the earth, then F = m x g g = 9.8 m / s ² (gravitational accelerator value) L = m x g x s (Work = mass x gravitational acceleration x displacement)
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But first we must do two conversations, and bring in meters and centimeters kilograms grams: 8.5 cm = m 380 grams = 0.38 kg
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Now we can apply the law mxgxs = , then: = 0. 38 kg x 9
Now we can apply the law mxgxs = , then: = 0.38 kg x 9.8 m / s ² x m = 0.31 J But as 0,31 J is the work done in each step, then: x 32 J = 10 J
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