Comments on Is $r \times \frac{d}{dt} mv=\frac{d}{dt} (r \times mv)$
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Is $r \times \frac{d}{dt} mv=\frac{d}{dt} (r \times mv)$
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Is $$r \times \frac{d}{dt} mv=\frac{d}{dt} (r \times mv)$$
I was thinking that it is wrong. Cause, which is outside of differentiation how we can put that inside differentiation no matter that's constant or not.
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