Question 9. When angular velocity changes with respect to time then? (a) an angular acceleration is produced (b) a linear acceleration is produced (c) it constitute a couple (d) a linear velocity is produced Answer
Similarly, change of angular velocity with respect to time produces angular acceleration.What actually happens is that friction grabs the rim at the point of contact and pulls it backwards. This causes a torque that causes angular acceleration; thus increasing angular velocity over time. Energy conservation still holds true. The energy for this rotational motion must be taken from the linear motion
