Answer to Question #165865 in Algorithms for Khidr

Question #165865

A particle of mass M1 moving with initial velocity  is incident on a stationary particle of mass M2.After collision, M1 was deflected through an angle  and M 2 an angle .If the velocity of the particles after collision were  and  respectively.Show that for an elastic collision;

(a)    = 2


(b)   =2 +



(c)    =


1
Expert's answer
2021-02-23T04:04:53-0500

Given,

Masses of the particles are M1M_1 and M2M_2 and their respective velocities after the collision are v1v_1 and v2v_2 and initial velocity of the mass M1M_1 is vov_o

Let after the collision the deflection angle be θ\theta for both,

Now, applying the conservation of linear momentum,

M1v0=M1v1cosθ+M2v2cosθ\Rightarrow M_1v_0=M_1v_1\cos{\theta}+M_2v_2\cos{\theta}

M1v1sinθ=M2v2sinθ\Rightarrow M_1v_1\sin{\theta}=M_2v_2\sin{\theta}

Now, substituting the values,

M1v0=2M2v2cosθ\Rightarrow M_1v_0=2M_2v_2\cos{\theta}

Now, again,

v2=M1v02M2cosθv_2=\frac{M_1v_0}{2M_2\cos{\theta}}



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