I think the forces that act on the plan are normal force and air resistance and gravity.

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Originally Posted by MS_SUMTER2010

i think the forces that act on the plan are normal force and air resistance and gravity.

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Déjà vu - I feel like I'm Bill Murray in the movie "Ground Hog Day!" See post #10.

I said gravity and air resistance on post #10.

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Originally Posted by MS_SUMTER2010

i said gravity and air resistance on post #10.

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Neither of which were correct when you guessed then, so why do you think they might be correct now? Stop just guessing at the answer and THINK - do either of these forces act towards the center of the circle?

No just the normal force.

Normal force it is!

Thank you for your help. I had needed it.

You're welcome!