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26 April, 18:21

You carry a 7.0 kg bag of groceries 1.2 m above the ground at constant velocity across a 6.8 m room. How much work do you do on the bag in the process? A) 396J B) 466J C) 0.0J D) 82J

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  1. 26 April, 22:19
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    Option (d)

    Explanation:

    m = 7 kg

    h = 1.2 m

    d = 6.8 m

    Work done in lifting the bag = F x h x Cos 0 = mg x h x 1 = 7 x 9.8 x 1.2

    = 82.32 J

    Work done in moving the bag = f x d x Cos 90 = 0

    So, teh work done in complete process = 82.32 + 0 = 82.32 = 82 j
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