find the angle between the vectors A=4i+6j an 2 points each l. A force F, in the

Question

find the angle between the vectors A=4i+6j an 2 points each l. A force F, in the negative direction is applied to a particle in the y plane. The arrow that best represents the torque produced by F on the particle with respect to the origin is 2. The vector C could represent, A. B. B C. D. E. None of these is possible. 3. wheel is set spinning and is then hung by a rope placed at one end of the axle. If the wheel is spinning as shown, the angular momentum of the wheel could be represented by vector B 2

Explanation / Answer

1) The position vector from origin to the particle and acting force are in x-y plane with the right hand thumb rule we get the direction of torque as in positive z direction ( torque = r x F)

Answer A 1

2) from fig we have A = i hat

                        B= -k hat

                       C = -j hat

therefore C=BxA

Answer D

3) the angular momentum direction is given by the relation r x v

therefore we the direction is along 5

Answer E

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