1

What is the magnitude of angular momentum in this ques ?


A particle of mass m = 5 is moving with a uniform speed of  3\sqrt2  units in the XOY plane along the line y = x + 4. The magnitude of the angular momentum about the origin is:

a) 60

b) 40\sqrt2

c) 0

d) 7.5

Answers (1)


1

Equation of line: x - y + 4 = 0

Distance of line from origin; = \tiny \frac{0 - 0 + 4}{ \sqrt{1^{2} + 1^{2 }} } = \tiny \frac{4}{\sqrt{2}}

 

Angular momentum = mvr = \tiny 5 * 3\sqrt{2} * \frac{4}{\sqrt{2}}

= 60 units.

Ans is (a)



27-10-2015 11:15
~4

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