A mass of 2 kg is whirled in a horizontal circle by means of a string at an initial speed of 5 revolutions per minute. Keeping the radius constant the tension in the string is doubled. The new speed is nearly

Join BYJU'S Learning Program

An object of mass 1g is whirled in a horizontal circle of radius 0.5m at a constant speed of 2m/s. The work done on the object during one revolution is:

The correct option is A 0JAs in circular motion displacement is zero. work=force.displacement=force∗0=0J

An object of mass $1 g$ is whirled in a horizontal circle of radius $0.5 m$ at a constant speed of $2 m / s$ . The work done on the object during one revolution is:

The correct option is A $0 J$
As in circular motion displacement is zero. $w o r k = f o r c e . d i s p l a c e m e n t = f o r c e * 0 = 0 J$