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A 3.20 kg rock has a horizontal velocity of magnitude 12.0 m/s when it is at point P in the figurescreenshot-nimbus-capture-2021.04.21-23_31_00.png

At this instant, what is the magnitude of its angular momentum relative to point O?

Express your answer in kilogram-meters squared per second.

b) 

If the only force acting on the rock is its weight, what is the magnitude of the rate of change of its angular momentum at this instant?

Express your answer in kilogram-meters squared per second squared.


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