ICSE Class 10 Physics 2014 Solved Paper

Question : 30 of 66

Marks: +1, -0

A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road. Who does more work against the force of gravity and why?

Solution:

Man climbs up a slope does more work against the force of gravity because potential energy is directly related to the height.
As,

\;\text " P.E. "\;\;=\;\text " work done "\;= {\F} × {\S}

\;=m g × h

while the work done by the man walking on a levelled road is zero.

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