€¦ · cosoti + sinotj dr — osinoti + ocosotj dt dV —o cosoti —o sinotj dt since r.V = Oso...
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€¦ · cosoti + sinotj dr — osinoti + ocosotj dt dV —o cosoti —o sinotj dt since r.V = Oso r -L r V and a = —02r so a will be always aiming towards the origin