Calculate the force exerted on a rocket when the propelling gases are being expelled at a rate of 1400 kg/s with a speed of 3.6×104 m/s .

Based from Newton's second law of motion, the net force exerted on an object is equal to the product of its mass and the acceleration. 
 
       F = m x a 

From this item, we are given of the expulsion rate and the speed, which may also be multiplied with each other in order to determine the net force.

     F = (1400 kg/s)(3.6 x 10^4 m/s)

Simplifying,
    F = 50400000 N

In scientific notation,

  F  = 5.04 x 10^7 N