Question

A rocket is ejecting $1kg$ of gases per second at a velocity of $60km/s$. The accelerating force on the rocket is.

• A. $\text{60 N}$
• B. $\text{600 N}$
• C. $\text{6,000 N}$
• D. $\text{60,000 N}$

Answer 1

Answer: (D)

$\text{60,000 N}$

Given,

Mass ejection rate, $\frac{m}{t}=1kg/s$

velocity, $v=60km/s=60,000m/s$

The accelerating force on the rocket can be given as:

$F=\frac{m}{t}\times v$

$F=1\times 60,000=60,000N$

The correct option is $\left(D\right)$.