Question

A boy tied a string to one of the ends
of a box and started sliding the
box on
a playground. He then
observed a circular track and rushed
there and completed half revolution of
the track with his box. The work done
by friction on the box is
a.negative
b.
zero
C. positive
d. infinite​

Answer 1

Answer:

infinite because it is saying that is the half revolution

Answer 2

Answer:

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