Let v(t) = r '(t). Show that N(t) v(t)r'' (t) - v'(t)r' (t) |v(t)r(t) - v'(t)r' (t)||
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Let v(t) = ΙΙr '(t)ΙΙ. Show that
N is the unit vector in the direction T'(t). Differentiate T(t) = r'(t)/v(t) to show that v(t)r"(t) − v'(t)r (t) is a positive multiple of T '(t).
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N(t) v(t)r'' (t) - v'(t)r' (t) |v(t)r"(t) - v'(t)r' (t)||
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Since vt r t and Tt is a unit vector in the direction at r t we may write r t ...View the full answer
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