explain For a proper re-entry into the Earth\'s atmosphere the pilots of a space

Question

explain

For a proper re-entry into the Earth's atmosphere the pilots of a space capsule must reduce their velocity 2.0 times 104 m/s to 1.0 times 104 m/s. Their rocket engine produces a thrust of 2.0 times 106 N. The mass of the ship 3.0 times 103kg. Assume the fuel mass consumed is negligible compared to the mass of the ship. For how long must they fire their engine? 90 s 60 s 45 s 30 s 15 s 5 s Approximately what constant power is needed to push a mass M = 10 kg a distance of 2.0 m up along a frictionless incline of 30 degree in a time t = 4.0 s? 10W 100W 50W 25W 75W 125W

Explanation / Answer

5)E

6)F

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