Question #fadc0

1 Answer
MetaPhysik
Jan 22, 2018

0

Explanation:

Work = Fd

where F and d must be in the same or opposite direction.

Now that F= weight = mg. The weight is pointing downward.
Since the force does not move up and down, the effective distance traveled by the force is thus d=0, even though the body itself has moved sideway for a distance #Deltax = 20m/s*t #.

Therefore,

Work# = Fd =mg*0=0#

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