Briefly describe significant differences between kinetic and potential energy, a

Question

Briefly describe significant differences between kinetic and potential energy, and give an example of each form of energy being generated by work. State the principle of conservation of energy as you would explain it to a friend or relative. Explain briefly the significant differences between power and energy, including units. How much work would it take to push a 1200 kg car at constant velocity 200 m (measured along the hill) up a 6 degree hill, assuming How much work would an ant do on a 0.05 g crumb while pushing it to the edge of a picnic table (mu k = 0.4) 50 cm away if the crumb You are pushing a 150 kg beg across a 5 meter long room. If the push force you exert on the bed is (0.068 N/m)x where x is the displacement of the bed, then determine the work you do on the bed.

Explanation / Answer

4.1) m = 1200
s = 200
? = 6
? = 0.2

f = ?Fn

sum of x forces:?????????????????sum of y forces:
F - f - mgCos? = ma?????????Fn - mgSin? = ma
F - f - mgCos? = 0????????????Fn - mgSin? = 0
F = f + mgCos??????????????????Fn = mgSin?
F = ?Fn + mgCos?
F = ?mgSin? + mgCos?
F = mg(?Sin? + Cos?)

W = Fs
W = mg(?Sin? + Cos?)s
W = 1990238 J

4.2) A) At uniform vel., F =

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