A 64.0-kg man is riding an escalator in a shopping mall. The escalator moves the man...
A 64.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 5.50 m. What is the work done on the man by (a) the gravitational force and (b) the escalator?
Homework Answers
(a) Gravitational force =mg =64 x9.8 =627.2 N
Work by gravitational force = mgh =64 x9.8 x5.5 =3449.6 J
(b) Due to moving up the man gain potential energy of 3449.6 J
And this energy is supplied by escalator.
So work done by escalator on man= 3449.6 N
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