Questions
A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about the horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions s-2 is
detailed solution
Correct option is D
Here α=2 revolutions/s2 =4πrad/s2I=12MR2=12(50)(0.5)2=254kg−m2As τ=Iα so TR=Iα⇒T=IαR=254(4π)(0.5)N=50πN=157NTalk to our academic expert!
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A body is placed on a horizontal frictionless surface. When a horizontal force F is applied on the body, it is observed that the body makes only translational motion. The which of the following points may be the positions of its centre of mass?
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