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Matching block type
LIST - I LIST - II
a) Two rotating discs are brought in contact coaxially
b) Contact force on a body placed in on rough surface
c) To continue a motion is easier than to initiate the motion
d) For a Static friction less than limiting friction
e) Generated friction is equal to applied external force in magnitude
f) Loss of Rotational KE is transformed partly to heat
g) The resultant of normal reaction and friction
h) Kinetic friction is less than static friction

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a-h, b-e, c-f, d-g

a-e, b-h, c-g, d-f

a-g, b-f, c-e, d-h

a-f, b-g, c-h, d-e

answer is A.

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Detailed Solution

When two rotating discs are bought in contact with each other coaxially the loss of rotational Kinetic energy is transformed into heat energy.

Contact force is the resultant of normal reaction and friction.

As the kinetic friction is less than the static friction it is easy to continue a motion than to initiate the motion.

When the applied external force is less the limiting static friction, the static friction acting will be less than the limiting friction.

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