System of Particles and Rotational Motion - Result Question 49

52. Angular momentum is

[1994]

(a) vector (axial)

(b) vector (polar)

(c) scalar

(d) none of the above

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Answer:

Correct Answer: 52. (a)

Solution:

  1. (a) Angular momentum L is defined as L=r×m(v)

So, L is an axial vector.

(a)

y=x+4 line has been shown in the figure when x=0,y=4. So, OP=4.

The slope of the line can be obtained by comparing with the equation of the straight line y=mx+c

m=tanθ=1

θ=45

OQP=OPQ=45

If we draw a line perpendicular to this line, length of the perpendicular =OR

Missing \end{aligned}

Angular momentum of particle going along this line =r×mv=22×5×32=60 units



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