1

A particle of mass m = 5 is moving with a uniform speed of units in the XOY plane along the line y = x + 4. The magnitude of the angular momentum about the origin is:

a) 60

b)

c) 0

d) 7.5

1

Equation of line: x - y + 4 = 0

Distance of line from origin; = =

Angular momentum = mvr =

= 60 units.

Ans is (a)