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A slender rod of mass  and length  rests on a horizontal frictionless surface. The rod is pivoted about one of its ends. The impulse of the force exerted on the rod by the pivot when the rod is struck by a blow of impulse  perpendicular to the rod at other end is

a)

b)

c)

d)

Information is insufficient



Question ID - 100491 | SaraNextGen Top Answer

A slender rod of mass  and length  rests on a horizontal frictionless surface. The rod is pivoted about one of its ends. The impulse of the force exerted on the rod by the pivot when the rod is struck by a blow of impulse  perpendicular to the rod at other end is

a)

b)

c)

d)

Information is insufficient

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

Let  be the impulse exerted by the pivot on the rod. Then from impulse momentum theorem,  where  is the velocity acquired by the centre of mass

Now apply, angular impulse = change in angular momentum about the pivot

 where  is the angular velocity of the rod

127 votes


127