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When a 1.0 kg cart moving with a speed of 0.5 m/s on a horizontal surface collides with a second 1.0 kg cart initially at rest, the carts lock together. What is the speed of the combined carts after the
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When a 1.0 kg cart moving with a speed of 0.5 m/s on a horizontal surface collides with a second 1.0 kg cart initially at rest, the carts lock together. What is the speed of the combined carts after the collision?

User VineetChirania
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m1u1 + m2u2 = mV
1×0.5 + 1×0 = 2×V
V=0.5/2= 0.25ms-1
User Stonedonkey
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