A cart with mass 340 g sliding with a speed of 1.20 m / s on a frictionless surf

Question

A cart with mass 340 g sliding with a speed of 1.20 m / s on a frictionless surface. This cart collides with another vehicle that is at rest. The collision is elastic and occurs along a straight line. The mass of the second carriage is unknown. After the collision the first cart is moving with speed 0600 m / s in its original direction of motion. a, What is the mass of the vehicle number two? b, What is this vehicle speed after the collision? c What is the velocity of the mass center of the two cars?

Explanation / Answer

moment constant 340x1.2=340v1-m2v1 ..........(1) 0.5x340x1.2^2=0.5(340+m2)v1^2 ....(2) m2=[408-340v1]/v1 244.8=170v1^2+0.5m2v1^2 244.8=170v1^2+0.5([408-340v1]/v1)v1^2 244.8=204v1 v1=1.2 m/s m2=0

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