641
Question 641
A cord is pulled with a steady force of 25 N. If 2 meters of cord is unwound from a flywheel, what is the work done by the force?
642
Question 642
What happens to the kinetic energy of a rotating body when work is done by an external torque in the absence of friction?
643
Question 643
Which of the following equations equates the power delivered by torque to the rate of change of kinetic energy?
644
Question 644
What is the rate of increase of rotational kinetic energy given by?
645
Question 645
In rotational motion, what quantity is analogous to force in linear motion?