Question

​A laborer lifts a body of mass 10 kg to the roof of a building 20 m high. How much work he performd against gravity?

Answer 1

Given,

m=10kg

S=20m

Let we take g=10m/s²

WKT,

W=FS

W=m(-g)×s

W=10×(-10)×20

W=-2000,,

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