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
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Thrust = force x time
thrust = \(\frac{m(v - u)}{t}\) x \(\frac{t}{1}\)
270 = m(300 - 0)
m = 0.90kg
Source: Myschool Past Questions Archive (Record #28401)