Physics And Measurement Question 255
Question: The thrust developed by a rocket-motor is given by $ F=mv+A(P _{1}-P _{2}) $ where m is the mass of the gas ejected per unit time, v is velocity of the gas, A is area of cross-section of the nozzle, $ P _{1} $ and $ P _{2} $ are the pressures of the exhaust gas and surrounding atmosphere. The formula dimensionally
Options:
A) Correct
B) Wrong
C) Sometimes wrong, sometimes correct
D) Data is not adequate
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Use principle of homogeneity.
