The correct answer to the question is 2.27 [tex]m/s^2[/tex] i.e the acceleration of the body is 2.27 [tex]m/s^2[/tex] along the forward direction.
CALCULATION:
As per the question, the net external force on the propeller of model airplane F = 6.8 N.
The mass of the model air plane m = 3.0 kg
We are asked to calculate the acceleration of the air plane.
From Newton's second law of motion, we know that the net external force acting on a body is equal to the product of mass with acceleration of that body.
Mathematically force F = m × a
⇒ [tex]a=\ \frac{F}{m}[/tex]
[tex]=\ \frac{6.8\ N}{3.0\ kg}[/tex]
[tex]=\ 2.27\ m/s^2[/tex] [ans]
The direction of acceleration is along the direction of force. Hence, the acceleration of the propeller is 2.27 [tex]m/s^2[/tex] along forward direction.
