Question:
Diwali rocket is ejecting $50\, g$ of gasses at a velocity of $400 \,m/s$ . The accelerating force on the rocket will be
Diwali rocket is ejecting $50\, g$ of gasses at a velocity of $400 \,m/s$ . The accelerating force on the rocket will be
Updated On: Jun 7, 2022
- 22 dyne
- 20 N
- 20 dyne
- 100 N
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The Correct Option is B
Solution and Explanation
The accelerating force on the rocket
upward thrust $=\frac{\Delta m}{\Delta t} \cdot u$
Given, $\frac{\Delta m}{\Delta t}=50 \times 10^{-3} kg / s ,\, v=400\, m / s$
So, accelerating force $=50 \times 10^{-3} \times 400$
$=20\, N$
upward thrust $=\frac{\Delta m}{\Delta t} \cdot u$
Given, $\frac{\Delta m}{\Delta t}=50 \times 10^{-3} kg / s ,\, v=400\, m / s$
So, accelerating force $=50 \times 10^{-3} \times 400$
$=20\, N$
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Concepts Used:
Motion in a straight line
The motion in a straight line is an object changes its position with respect to its surroundings with time, then it is called in motion. It is a change in the position of an object over time. It is nothing but linear motion.
Types of Linear Motion:
Linear motion is also known as the Rectilinear Motion which are of two types:
- Uniform linear motion with constant velocity or zero acceleration: If a body travels in a straight line by covering an equal amount of distance in an equal interval of time then it is said to have uniform motion.
- Non-Uniform linear motion with variable velocity or non-zero acceleration: Not like the uniform acceleration, the body is said to have a non-uniform motion when the velocity of a body changes by unequal amounts in equal intervals of time. The rate of change of its velocity changes at different points of time during its movement.