A rocket with an initial mass of 1000 kg adjusts its thrust by varying the rate at which mass is ejected. The ejection speed relative to the rocket is 40 km/s. If the acceleration of the rocket is to have a magnitude of 20 m/s2 at an instant when its mass is 80% of the original mass, at what rate is mass being ejected at that instant? Ignore any external forces on the rocket
a. 0.40 kg/s
b. 0.50 kg/s
c. 0.60 kg/s
d. 0.70 kg/s
e. 0.80 kg/s
a
Physics & Space Science
You might also like to view...
Which of the following is true of a comet nucleus?
A) It is in its gaseous form when it is far from the Sun. B) It remains inactive while it is far from the Sun. C) It causes the tail of the comet to point toward the Sun. D) It is mainly composed of nonvolatile compounds.
Physics & Space Science
Suppose an extrasolar planet's orbit around its star is edge-on to our line of sight. How is it detected, and what information can be obtained in this case?
What will be an ideal response?
Physics & Space Science
Temperature Scales: Express a body temperature 98.6°F in Celsius degrees.
A. 37.0°C B. 45.5°C C. 66.6°C D. 72.6°C
Physics & Space Science
The ozone layer lies in the mesosphere
Indicate whether the statement is true or false
Physics & Space Science