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Showthatdl/dt=τ,whereListheangularmomentumandτisthetorque​

Answer»

Torque=r×f

a.m.=r×p

differentiating both sides w.r.t.time

dL =d(r×p)

DT. dt

dr ×p+r×dp

dt. dt

v×p+r×f. ( by NEWTON II law)

Torque=dL

dt



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