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) |

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 - 5876 Votes

3537

**(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