a sack of feathers weighing 10 N falls from a height of 2 m. how much work does the gravitational force do?
a. 5 J
b. 20 J
c. 4200 J
d. 200 J
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weight (mg) = 10 N
F = 10 N
height(d)= 2m
work done = F×d =10×2 =20 J
F = 10 N
height(d)= 2m
work done = F×d =10×2 =20 J
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