A canon shell moving along a straight line bursts into two parts. Just after the burst one part moves with momentum `20 N s` making an angle `30^(@)` with the original line of motion. The minimum momentum of the other part of shell just after the burst is

Options

A. `0N-s`
B. `5N-s`
C. `10N-s`
D. Depends on mass of individual particles

Answer

C

Explanation

For the minimum value of momentum of other part it must be directed in nefative Y-direction.

Momentum is conserved along both x & y direction for the minimum value of 'P'
`Py_("net")=0rArrP'-20cos60^(@)=0rArrP'=10N-s`