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Units And Measurement

Question
CBSEENPH11020154

Read each statement below carefully, and state, with reasons, if it is true or false;

A wheel moving down a perfectly frictionless
 inclined plane will undergo slipping (not rolling) motion.

Solution
True
The rolling occurs only on account of friction which is a tangential force capable of providing torque. When the inclined plane is perfectly smooth, the wheel will simply slip under the effect of its own weight.