Asmall engine causes a 0.30 kg model airplane to accelerate at a rate of 11 m/s2. what is the net force on the model airplane?

Answer : F = 3.3 N

Explanation :

It is given that :

Mass of model airplane, m = 0.3 kg

Acceleration,

According to Newton's second law :

Force acting on an object is the product of mass and the acceleration with which it is moving.

F = m a

So,

So, the net force on the model airplane is 3.3 N.

the answer is b, have negligible mass

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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