a. An astronaut holding a heavy object floats in empty space. When he throws the object,...

a. An astronaut holding a heavy object floats in empty space. When he throws the object, he finds himself moving in the opposite direction. Explain, using conservation of momentum, why this occurs.
b. A system starts with a net momentum of zero and is only affected by internal forces. After a series of events, what must the net momentum of the system be? If the forces are external, why is this not necessarily the case?
c.A box slides along ice at a rate of 5m/s. After experiencing a perfectly elastic collision with another box, the second box slides with a rate of 5m/s. What must be true of the masses of these two boxes? Explain.

Solutions

Expert Solution

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

A physics student is sitting on a rotating platform. He is holding a heavy weight in...

A physics student is sitting on a rotating platform. He is holding a heavy weight in each of his outstretched hands. At request of his physics instructor(!) he carries out various manoeuvres to try to change his angular velocity. Which of the following scenarios are described correctly? Select True or False. 1) True False Starting at rest, he drops the weights. His angular velocity decreases. 2) Starting with angular velocity ωgw, he brings the weights in to his chest. His...

An object with mass 70 kg moved in outer space. When it was at location <7,...

An object with mass 70 kg moved in outer space. When it was at location <7, -35, -5> its speed was 5.0 m/s. A single constant force <210, 400, -150> N acted on the object while the object moved from location <7, -35, -5> m to location <11, -27, -8> m. Then a different single constant force <140, 250, 210> N acted on the object while the object moved from location <11, -27, -8> m to location <17, -31, -3>...

An object with mass 100 kg moved in outer space. When it was at location <11,...

An object with mass 100 kg moved in outer space. When it was at location <11, -21, -7> its speed was 4.0 m/s. A single constant force <250, 330, -140> N acted on the object while the object moved from location <11, -21, -7> m to location <16, -14, -10> m. Then a different single constant force <100, 260, 170> N acted on the object while the object moved from location <16, -14, -10> m to location <19, -21, -5>...

A football quarterback is traveling straight backward at a speed of 5.1 m/s when he throws...

A football quarterback is traveling straight backward at a speed of 5.1 m/s when he throws a pass to a receiver 15.5 m straight downfield. (a) If the ball is thrown at an angle of 25° relative to the ground and is caught at the same height as it is released, what is its initial speed relative to the ground in m/s? (b) How long does it take to get to the receiver in s? (c) What is its maximum...

A 82.9-kg man is standing on a frictionless ice surface when he throws a 1.70-kg book...

A 82.9-kg man is standing on a frictionless ice surface when he throws a 1.70-kg book horizontally at a speed of 13.0 m/s. With what speed does the man move across the ice as a result? Give your answer in m/s, and be sure to use three significant figures in your answer.

When captain Fallowell was in the space station, he had more blood circulating through his torso...

When captain Fallowell was in the space station, he had more blood circulating through his torso and to his internal organs. As a result what happened to each of the following measures for him? a. renin levels b. aldosterone levels c. ADH levels d. thirst e. atrial natriuretic peptide f. urine volume g. blood volume

Subjects