The net external force on the propeller of a 3.0 kg model airplane is 6.8 n forward. what is the acceleration of the airplane? answer in units of m/s^2.

The correct answer to the question is 2.27 i.e the acceleration of the body is 2.27 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

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                                                           [ans]

The direction of acceleration is along the direction of force. Hence, the acceleration of the propeller is 2.27 along forward direction.

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s