In a glancing collision between two identical steel spheres, which of the follow

Question

In a glancing collision between two identical steel spheres, which of the following statements are correct? (Assume this collision is perfectly elastic. Select all that apply.)

1. Linear momentum will be conserved in this collision.

2. The sum of the velocity vectors of the two spheres in the original direction of the incoming sphere after the collision will be equal to that of the incoming sphere.

3. The velocities of the spheres after the collision in the direction perpendicular to the incoming direction will be equal in magnitude and opposite in direction.

4.Kinetic energy in this collision will be conserved.

Explanation / Answer

1) In glancing collision lienar momentum is conserved

2) KE is conserved

3) The spheres are identical hence we have

mu1+mu2 = mv1+mv2 , by conservation of momentum

u1+u2 = v1+v2

Some of velocity vectors before collision is equal to someof velocity vectors after collision

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