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Problem 6.16
What thrust does a 180 g model rocket need in order to
have a vertical acceleration of 12.0 m/s²...

A) On Earth?

B)On the Moon, where g=1.62 m/s^2?

Respuesta :

A) 3.92 N

In order to model the find the thrust of the rocket, we need to write the equation of the forces acting on it. We have:

- The weight of the rocket, W = mg, acting downward, where m = mass of the rocket and g = acceleration of gravity

- The thurst of the rocket, F, acting upward

The resultant of these forces must be equal to the product between mass and acceleration, so we can write:

[tex]F-mg = ma[/tex]

Where, for the rocket on Earth, we know:

m = 180 g = 0.180 kg is the mass

[tex]g=9.8 m/s^2[/tex] is the acceleration of gravity

[tex]a=12.0 m/s^2[/tex] is the acceleration of the rocket

Solving for F, we find the thrust:

[tex]F=m(g+a)=(0.180)(9.8+12.0)=3.92 N[/tex]

B) 2.45 N

On the Moon, the situation is exactly the same, but the acceleration of gravity is different:

[tex]g=1.62 m/s^2[/tex]

Then we can use the same equation:

[tex]F-mg = ma[/tex]

where

m = 180 g = 0.180 kg is the mass

[tex]a=12.0 m/s^2[/tex] is the acceleration of the rocket

And solving for F,

[tex]F=m(g+a)=(0.180)(1.62+12.0)=2.45 N[/tex]

The Thrust of the rocket on (A) The earth is 3.924 N (B) The moon is 2.452 N

To calculate the thrust the rocket needs, we use the formula below.

Formula:

  • T = mg+ma.................. Equation 1

Where:

  • T = Thrust of the rocket
  • m = mass of the rocket
  • g = acceleration due to gravity
  • a = acceleration of the rocket.

(A) On the earth,

Given:

  • m = 180 g = 0.18 kg
  • a = 12 m/s²
  • g = 9.8 m/s²

Substitute these values into equation 1

  • T = [(0.18×9.8)+(0.18×12)]
  • T = (1.764+2.16)
  • T = 3.924 N.

(B) On the moon where g = 1.62 m/s²

Substitute into equation 1

  • T = [(0.18×1.62)+(0.18×12)
  • T = (0.2916+2.16)
  • T = 2.452 N

Hence, The Thrust of the rocket on (A) The earth is 3.924 N (B) The moon is 2.452 N
Learn more about Thrust here: https://brainly.com/question/863770