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A small, 200 gg cart is moving at 1.90 m/sm/s on a frictionless track when it...

A small, 200 gg cart is moving at 1.90 m/sm/s on a frictionless track when it collides with a larger, 5.00 kgkg cart at rest. After the collision, the small cart recoils at 0.810 m/sm/s .

What is the speed of the large cart after the collision?

Express your answer with the appropriate units.

A 2.2 kgkg block slides along a frictionless surface at 1.4 m/sm/s . A second block, sliding at a faster 4.4 m/sm/s , collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.4 m/sm/s .

What was the mass of the second block?

Express your answer with the appropriate units.

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