A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases...

JAMB 1987

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

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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

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A jet engine develops a thrust of 270Ns when the velocity of the exhaust gases...

Correct Answer: Option C

Explanation

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