Case 1 and case 2 show two situations of a block hanging
from a string wrapped around the outside of a pulley. The
blocks are identical, and the pulleys are uniform solid
disks of the same radius, but the pulley in case 2 has twice
the mass (and therefore twice the moment of inertia) of
the pulley in case 1. The systems are released from rest at
the same time from the same height above the ground, and
in both cases the block accelerates down. Neglect friction.
(a) In which case is the acceleration of the block
larger?
(b) In which case is the tension in the string, while the block is falling, larger?
(c) In which case is the net torque on the pulley, while the block is falling, larger?
(d) In which case does the block have a higher speed after falling through a distance h?
(e) In which case does the pulley have a larger rotational kinetic energy, measuring the
kinetic energy at the instant the block reaches the ground in each case?
2007-11-26
09:00:25
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1 answers
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asked by
yep
1
in
Physics