A wheel of radius R and mass M is placed at the bottom of a fixed step of height R as shown in the figure. A constant force is continuously applied on the surface of the wheel so that it just climbs the step without slipping. Consider the torque 
about an axis normal to the plane of the paper passing through the point Q. Which of the following options is/are correct?
but the wheel never climbs the step
Text Solution
Verified by ExpertsA
• As the force acts as shown and considering its F' direction to be constant, then
Which definitely infers that as 
increases,
decreases.
• As soon as force is applied as shown, it leads to frictional force between bottom point and horizontal surface, which will produce non-zero torque about point Q.
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