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Q1. The small spherical planet called "Glob" has a mass of 6.54×10^18 kg and a radius of 6.29×10^4 m. An astronaut on surface of Glob throws a rock straight up. The rock reaches a maximum height of 2.00×103 m, above the surface of planet, before it falls back down. What was the initial speed of the rock as it left astronaut's hand? (Glob has no atmosphere, so no energy is lost to air friction. G = 6.67×10-11 Nm2/kg2.)

Q2. If a four-engine jet accelerates down the runway at 1.00 m/s2 and three of the jet engines fail, how much acceleration will the other one produce?

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