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Chapter 9: Q76P (page 253)
A 6090 kgspace probe moving nose-first toward Jupiter at 105 m/srelatives to the Sun fires its rocket engine, ejectingof exhaust at a speed of 253 m/srelatives to the space probe. What is the final velocity of the probe?
Final velocity of the probe is 108m/s.
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In Fig. 9-21, projectile particle 1 is an alpha particle and target particle 2 is an oxygen nucleus. The alpha particle is scattered at angle and the oxygen nucleus recoils with speed localid="1661254577203" and at angle .In atomic mass units, the mass of the alpha particle is 4.00 uand the mass of the oxygen nucleus is 16.0 u. What are the (a) final and (b) initial speeds of the alpha particle?
A 0.15kgball hits a wall with a velocity of . It rebounds from the wall with a velocity of . What are (a) the change in the ball鈥檚 momentum, (b) The impulse on the ball, and (c) the impulse on the wall?
During a lunar mission, it is necessary to increase the speed of a spacecraft by when it is moving atrelative to the Moon. The speed of the exhaust products from the rocket engine isrelative to the spacecraft. What fraction of the initial mass of the spacecraft must be burned and ejected to accomplish the speed increase?
A 2140 kgrailroad flatcar, which can move with negligible friction, is motionless next to a platform. A 242 kgsumo wrestler runs at 5.3 m/salong the platform (parallel to the track) and then jumps onto the flatcar. What is the speed of the flatcar if he then (a) stands on it, (b) runs at 5.3 m/s relative to it in his original direction, and (c) turns and runs at 5.3 m/s relative to the flatcar opposite his original direction?
In fig. 9-70, two long barges are moving in the same direction in still water, one with a speed of 10 km/hand the other with a speed of 20 km/hWhile they are passing each other, coal is shoveled from the slower to the faster one at a rate of 1000 kg/min. How much additional force must be provided by the driving engines of (a) the faster barge and (b) the slower barge if neither is to change the speed? Assume that the shoveling is always perfectly side-ways and that the frictional forces between the barges and the water do not depend on the mass of the barges.
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