Question

A particle is moving along a straight line parallel to x axis with constant velocity find angular momentum about the origin in vector form​

Answer 1

a particle is moving along a straight line parellel to x -axis .

hence position vector ( r^ ) = b j^

mass of body = m

velocity of body V^ = v i^

we know ,

angular momentum = m ( r^ x V^)

=m ( b j^ x v I^)

= -mbv k^

hence,

note :- I x j = k

so, j x i = - k