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Q. The radius of Earth is about 6.38 multiplied by 10^3 km. A 7.02 multiplied by 10^3 N spacecraft travels away from Earth. What is the weight of spacecraft at the following distances from Earth's surface: 6.38 times 10^3 km and 1.4 times 10^4 km?

Q. A jet plane lands with a velocity of +103m/s and can accelerate at a maximum rate of -5.02 m/s2 as it comes to rest. From instant it touches the runway, what is the minimum time needed before it can come to rest?

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