A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases relative to the engine is 300ms-1. What is the mass of the material ejected per second?
-
A.
81.00kg -
B.
9.00kg -
C.
0.90kg -
D.
0.09kg
Correct Answer: Option C
Explanation
Thrust = force x time
thrust = (frac{m(v – u)}{t}) x (frac{t}{1})
270 = m(300 – 0)
m = 0.90kg