A particle of mass 
units is moving with a uniform speed 
units in the XOY plane along the line 
. The magnitude of the angular momentum of the particle about the origin is
A
60 units
B
units C
zero
D
7.5 units
Text Solution
Verified by ExpertsThe correct answer is:
A
line has been shown in the figure.
When 
,
, So, 
.
The slope of the line can be obtained by comparing with the equation of line
If we draw a line perpendicular to this line.
Length of the perpendicular 
Angular momentum of particle going along this line
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