Q.

Match the following

 COLUMN-I COLUMN-II
A)Pure rollingP)Work done by friction may be greater than zero
B)Rolling with slippingQ)Work done by friction may be less than zero
C)Static frictionR)Work done by friction may be equal to zero
D)Kinetic frictionS)Heat is always generated
  T)The velocity at contact point is zero

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a

A–PQR, B–PS, C–PQS, D–PQR

b

A–PQT, B–PS, C–PR, D–PQR

c

A–PRT, B–PRS, C–PQR, D–PS

d

A–PQRT, B–PQRS, C–PQR, D–PQRS

answer is B.

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Detailed Solution

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When body is in pure rolling work done by friction can be anything.
When kinetic friction (or) body is slipping heat is always generated

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