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Q1. A 40kg boy and a 65kg girl are standing on ice skates on a smoothly frozen pond. The boy gives the girl a push and she slides at unchanging speed to the edge of the pond, 22m away, in 5.0 seconds. How fast is the boy sliding?

Q2. The mass of a space shuttle is approximately 2.0x10^6 kg. Throughout lift-off, the net force on the shuttle is 1.0x10^7 newtons directed upward. What is the speed of the shuttle 10 seconds after liftoff?

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