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show that for a single particle with constant mass the equation of motion implies the following differential equation for the kinetic energy
dT/dt=F.v
Aparticle moves in the X-Y plane under the constraint that its velocity vecter is always directed towards a point on the X axis whose abscissa is some given function of time F(t) .show that for F(t)differentiable, but otherwise arbitrary,the constraint is nonholonomic

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