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### Topic: Quick and Easy physics question regarding net force. I need quick clarification.  (Read 10634 times)

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#### MrHappy0

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##### Quick and Easy physics question regarding net force. I need quick clarification.
« on: September 19, 2011, 05:39:38 PM »
Hey,

So if a plane is flying with constant velocity along a horizontal plane that is "level" (W vector is perpendicular) and the acceleration is zero what is the net horizontal force?

I think it is zero because the net force equals mass(acceleration) and the acceleration is zero. Any have any ideas?

#### Anon88

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #1 on: September 19, 2011, 05:50:05 PM »
F=m(mass)*a(acceleration)
a=0

so I think F equals 0.

#### MrHappy0

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #2 on: September 19, 2011, 06:10:40 PM »
Yes, thank you for your reply. I ended up trying it anyways and got it correct.

#### fledarmus

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #3 on: September 19, 2011, 06:14:45 PM »
I presume we are ignoring drag?

#### MrHappy0

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #4 on: September 19, 2011, 06:17:45 PM »
Yup. I am in Physics 051 (fundamentals of physics). We just got into the 5th chapter on free-body diagrams and are ignoring friction and other forces that would complicate the problem. I am sure I will be back once we get there though.

#### Borek

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #5 on: September 20, 2011, 04:26:30 AM »
I presume we are ignoring drag?

Think the question over. It states "constant velocity", it doesn't say anything about why the velocity is constant.

In other words: it is not only drag that is ignored, as it is irrelevant to the question.
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#### fledarmus

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##### Re: Quick and Easy physics question regarding net force. I need quick clarification.
« Reply #6 on: September 20, 2011, 07:35:35 AM »
I presume we are ignoring drag?

Think the question over. It states "constant velocity", it doesn't say anything about why the velocity is constant.

In other words: it is not only drag that is ignored, as it is irrelevant to the question.

Sorry, I missed the "net" horizontal force in the original question