A cord of negligible mass is wound round the rim of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The work done by the pull when 2 m of the cord is unwound is a) 20 J b) 25 J c) 45 J d) 50 J

A cord of negligible mass is wound round the rim of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The flywheel is mounted on a horizontal axis with frictionless bearings Find the kinetic energy of the wheel at this point when 2m of the cord is unwound. Assume that wheel starts from rest.

A cord of negligible mass is wound round the rim of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The flywheel is mounted on a horizontal axis with frictionless bearings Compute the angular acceleration of the wheel.

A block of 2.5 kg is pulled 2.20m along a fricctionless horizontal table by a constant force 16N directed at 45^@ abve the horizontal. (i) Work done by the applied force is

A block of 2.5 kg is pulled 2.20m along a fricctionless horizontal table by a constant force 16N directed at 45^@ abve the horizontal. (ii) Work done by the normal force exerted by the table is

To transfer a charge of 20 C through a distance of 2 cm, 2J work is performed. What the potential difference between the end-point of that distance?

A block of 2.5 kg is pulled 2.20m along a fricctionless horizontal table by a constant force 16N directed at 45^@ abve the horizontal. (iii) Work done by the force of gravity is