Question

When an object is lifted from earth surface, what is the work done by applied force
on it
a) Z CTO
b) positive
c) negative
d) none of these​

Answer 1

Answer:

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Explanation:

A free-body diagram of an object being lifted with constant velocity through a distance d is shown on the right. The net force on the object is zero, Fa + Fg = 0. The displacement vector points in the upward direction. The work done by the applied force Fa, W = Fa·d = Fad = mgd, is positive