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