A 1000-kg space probe is motionless in space.To start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s.At the end of this process it is moving at 20 m/s.The approximate mass of the ejected gas is:
A)0.8 kg
B)4 kg
C)5 kg
D)20 kg
E)25 kg

Question

A 1000-kg space probe is motionless in space.To start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s.At the end of this process it is moving at 20 m/s.The approximate mass of the ejected gas is: 
A)0.8 kg 
B)4 kg 
C)5 kg 
D)20 kg 
E)25 kg

Quizplus · Accepted Answer

The Answer of A 1000-kg space probe is motionless in space.To start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s.At the end of this process it is moving at 20 m/s.The approximate mass of the ejected gas is: 
A)0.8 kg 
B)4 kg 
C)5 kg 
D)20 kg 
E)25 kg

A 1000-Kg Space Probe Is Motionless in Space