15. An electrician climbs up to the platform of a special tower in order to reach a
high-level spotlight, as shown in the figure.
a) Which form of energy, possessed by the electrician's body is greater at the top
of the tower than it was at the bottom?
b) Which form of energy possessed by the electrician is less at the top of the
tower that it was at the bottom?
c) An assistant is also there to help the electrician. The mass of the assistant is
less than the mass of the electrician.
Which of the them will have greater energy when they are at the top and why?
[2]
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