Questions
A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?
detailed solution
Correct option is B
Required work done =-Kf-Ki=0+Ki=Ki =12Iω2+12mv2=1212mR2ω2+12mv2 =34mv2=34×100×20×10-22=3 JTalk to our academic expert!
Similar Questions
I. Speed of any point on rigid body executing rolling motion can be calculated by the expression
where r is the distance of point from instantaneous centre of rotation.
II. Rolling motion of rigid body can be considered as a pure rotation about instantaneous centre of rotation.
Which of the above statement{s} is/are correct?
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