how much gravity is done by a workman carrying a 8kg sheet plywood up a 3m ramp inclined at an angle of 20 degrees to the horizo ntal?
1 answer:
Work is force times distance. Note that the only work done here is in the direction opposed to gravity, or if you prefer the change in height times the weight... W=3sin20(8*9.8) W≈80.44 J
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