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Translational Equilibrium Revisited

A string woun...

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A string wound round the rim of a mounted flywheel of mass 20kgand radius 20cm.A steady pull of 25 N is applied on the cord.Neglecting friction and mass of the string,the angular acceleration of the wheel is

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Q. A cord of negligible mass is wound around the rim of a flywheel (disc) of mass 20

k g

c m

. A steady pull of 25

N

is applied on the cord as shown in the figure. Angular acceleration of flywheel is :

Q. A cord of negligible mass is wound round the rim of fly wheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord as shown in the figure. The fly wheel is mounted on a horizontal axle with frictionless bearings. Compute the angular acceleration of the wheel.

Q. A cord of negligible mass is wound round the rim of fly wheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord as shown in the figure. The fly wheel is mounted on a horizontal axle with frictionless bearings. Find the workdone by the pull when 2 m of the cord is unwound.

Q. A cord of negligible mass is wound round the rim of fly wheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord as shown in the figure. The fly wheel is mounted on a horizontal axle with frictionless bearings. Find KE of the wheel at this point. Assume that the wheel starts from rest.

Q. A cord of negligible mass is wound round the rim of a fly wheel of mass

20

20

cm. A steady pull of

25 N

is applied on the cord as shown in Fig. The flywheel is mounted on a horizontal axle with frictionless bearings.
(a) Compute the angular acceleration of the wheel.
(b) Find the work done by the pull, when

2

m of the cord is unwound.
(c) Find also the kinetic energy of the wheel at this point. Assume that the wheel starts from rest.
(d) Compare answers to parts (b) and (c).

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