Rotational MotionHard
Question
Figure shows a uniform disk, with mass M = 2.4 kg and radius R = 20 cm, mounted on a fixed horizontal axle. A block of mass m = 1.2 kg hangs from a mass less cord that is wrapped around the rim of the disk. The tension in cord is
Options
A.12 N
B.20 N
C.24 N
D.None of these
Solution
For block : mg - T = ma ........ (i)
For disk (pulley) TR = Iα =
But α =
so T = 
...(ii)
Therefore
⇒ t = 
For disk (pulley) TR = Iα =
But α =
so T = ...(ii)Therefore
⇒ t = Create a free account to view solution
View Solution FreeMore Rotational Motion Questions
If vector be a force acting on a particle having the position vector and be the torque of this force about the origin, t...Let be the force acting on a particle having position vector and be the torque of thisforce about the origin. Then...The disc of radius r is confined to roll without slipping at A and B. If the plates have the velocities shown, then...If torque on a body is zero, then which is conserved:...Three thin uniform rods each of mass M and length L are placed along the three axis of a cartesian coordinate system wit...