A rocket of mass 1000 kg is exhaust gases at a rate of 4 kg/s with a velocity 3000 m/s. The thrust developed on the rocket is :

Question

A rocket of mass 1000 kg is exhaust gases at a rate of 4 kg/s with a velocity 3000 m/s. The thrust developed on the rocket is : (A) 12000 N (B) 120 N (C) 800 N (D) 200 N

Tardigrade Admin · Accepted Answer

m =1000 kg (Δ m /Δ t )=4 kg / s, v =3000 m / s Thrust on the rocket F =- v (Δ M /Δ t ) =-3000 × 4 =-12000 N (Negative sign indicates that thrust applied in a direction opposite to the direction of escaping gas)

Q. A rocket of mass $1000 k g$ is exhaust gases at a rate of $4 k g / s$ with a velocity $3000 m / s$ . The thrust developed on the rocket is :

12000 N

120 N

800 N

200 N

$m = 1000 k g$
$\frac{Δ m}{Δ t} = 4 k g / s, v = 3000 m / s$
Thrust on the rocket
$F = - v \frac{Δ M}{Δ t}$
$= - 3000 \times 4$
$= - 12000 N$
(Negative sign indicates that thrust applied in a direction opposite to the direction of escaping gas)

Q. A rocket of mass 1000kg is exhaust gases at a rate of 4kg/s with a velocity 3000m/s. The thrust developed on the rocket is :