Physics

Problem

Two identical carts, each of mass

0.50\,\text{kg}

, move along a straight, frictionless track. Cart A moves to the right at

4.0\,\text{m/s}

and collides head-on with cart B, which is initially at rest. The collision is perfectly elastic. Which of the following lists the speeds of the carts immediately after the collision? a) Cart A:

2.0\,\text{m/s}

; Cart B:

2.0\,\text{m/s}

b) Cart A:

0\,\text{m/s}

; Cart B:

4.0\,\text{m/s}

c) Cart A:

4.0\,\text{m/s}

; Cart B:

0\,\text{m/s}

d) Cart A:

2.8\,\text{m/s}

; Cart B:

1.2\,\text{m/s}

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