Physics

Physics, 29.07.2019 04:00, heyitseddie06

How does momentum conservation work for a rocket firing its engines to speed up in deep space?

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Physics, 02.09.2019 21:30, chuky1325

Arocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 56.6 × 105 kg, of which 8.50 × 105 kg is fuel. the rocket engine is then fired for 240 s, during which fuel is consumed at the rate of 350 kg/s. the speed of the exhaust products relative to the rocket is 2.38 km/s. (a) what is the rocket's thrust? after the 240 s firing, what are (b) the mass and (c) the speed of the rocket?

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Physics, 08.10.2019 04:10, amandapill

Acatapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 80.0 m/s at ground level. the engines then fire, and the rocket accelerates up- ward at 4.00 m/s2 until it reaches an altitude of 1 000 m. at that point, its engines fail and the rocket goes into free fall, with an acceleration of 29.80 m/s2. (a) for what time interval is the rocket in motion above the ground?

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Physics, 07.11.2019 05:31, AM28

Arocket expels gas at a high speed out of its back for a short period of time. we are going to treat the rocket as being far away from any gravitational objects. (a) draw a momentum chart for the rocket expelling gas in space. take the initial time before expelling gas and the final time after the rocket has finished expelling gas. the rocket has an initial constant speed in the horizontal direction. put the rocket and the expelled gas on separate rows. (b) use your chart to explain why the rocket speed increases. (c) does the rocket have to keep expelling gas to stay at a constant speed? explain.

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