Questions
A pulley one meter in diameter rotating at 600 revolutions a minute is brought to rest in 80 sec by a constant force of friction on its shaft. How many revolutions does it make before coming to rest?
detailed solution
Correct option is C
distance travel = average velocity x time =600+028060=400 revTalk to our academic expert!
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A disc can rotate about an axis passing through its centre and perpendicular to the plane of the disc. Initially the disc is stationary and its moment of inertia about the axis is 4 Kg-m2. A torque is applied on the disc which varies with time according to the graph shown in figure. Then angular velocity of the disc at the end of 6th second is
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