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A particle of mass  comes down on a smooth inclined plane from point  at a height of  from rest. The magnitude of change in momentum of the particle between position  ( just before arriving on horizontal surface)and  (assuming the angle of inclination of the plane as  with respect to the horizontal) is

a)

0

b)

2

c)

d)



Question ID - 100120 | SaraNextGen Top Answer

A particle of mass  comes down on a smooth inclined plane from point  at a height of  from rest. The magnitude of change in momentum of the particle between position  ( just before arriving on horizontal surface)and  (assuming the angle of inclination of the plane as  with respect to the horizontal) is

a)

0

b)

2

c)

d)

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

(c)

The velocity of the particle when it reaches point  from  is

 (directed along )

(i)

(ii)

When the particle reaches point  the momentum is as shown in fig

(iii)

        (iv)

Therefore

(v)

Magnitude of change in momentum is

127 votes


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