A system consisting of two objects has a total momentum of (18 kg m/sec)i and its center of mass has
the velocity of (3 m/s)i. One of the object has the mass 4 kg and velocity (1.5 m/s)i. The mass and velocity
of the other objects are
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A Sherpa of mass 80 kg is instructed to carry a package
of mass 20 kg from the base camp to the summit of a
mountain 1200 m high. (i) How much work the Sherpa
has to do against gravity? (ii) Also, find the change in
potential energy of the package if the potential energy
at the base of the mountain is taken as zero.
(Take g = 10 m s-2) (Ans. 1.2 * 106 J, 2.4 x 1053)
Explanation:
A Sherpa of mass 80 kg is instructed to carry a package
of mass 20 kg from the base camp to the summit of a
mountain 1200 m high. (i) How much work the Sherpa
has to do against gravity? (ii) Also, find the change in
potential energy of the package if the potential 053)
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