A rocket burns fuel at the rate of 10kgs-1 and ejects it with velocity of 5 x 103ms-1. The thrust exerted by the gas on the rock is
-
A.
2.5 x 107N -
B.
5.0 x 104N -
C.
5.0 x 102N -
D.
2.0 x 10-3N
Correct Answer: Option B
Explanation
Thrust = (frac{text{mass x velocity}}{time})
= 10 x 5 x 103
= 5.0 x 104N