Question

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 .

Answer 1

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