CBSE Class 11-science Answered
why a sphere cannot roll on a frictionless inclined surface?
Asked by mac12303190 | 10 Nov, 2010, 12:00: AM
Expert Answer
Dear student
Rolling down an incline cannot occur without friction, since the torque needed for the angular
acceleration can only be supplied by the frictional force, f . The other forces act through the center
of the rolling object and therefore produce zero torque.
acceleration can only be supplied by the frictional force, f . The other forces act through the center
of the rolling object and therefore produce zero torque.
However, friction does not dissipate energy in rolling because the bottom of the wheel is momentarily at rest
at each point of contact and is not sliding on the surface. As a result, the frictional force does no work.
at each point of contact and is not sliding on the surface. As a result, the frictional force does no work.
We hope that clarifies your query.
Regards
Team
TopperLearning
Answered by | 11 Nov, 2010, 10:14: AM
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