Question

Please I have an exam after 3 days .

A ball of mass 50 g rotates in a circular path of radius 20 cm.A tangetial force of magnitude 10N acts on the ball for 5 second,in the direction of rotation.By how much does its angular velocity increase ?​

Answer 1

0.87 N is the answer explaination a wheel of mass 10kg and radius 20cm is rotating at an angular speed of 100 rev/min when the motor is turned off.
To find the force that must be applied tangentially to the wheel to bring it to rest in 10 revolutions.