1.

(A) : When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction.(R ) : The frictional force only when the bodies are in contact.

Answer»

Both (A) and (R ) are true and (R ) is the CORRECT explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is FALSE
(A) is false but (R ) is true

ANSWER :D


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