🔺05 - Resolution of Forces 2 | Fundamental Problems R.C Hibbeler F2-9 and F2-10

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SkanCity Academy

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Пікірлер: 41

@زهراء-ج1ل4ذ Жыл бұрын

Tank you very mach❤

@SkanCityAcademy_SirJohn Жыл бұрын

You are welcome

@Joseph_Dan 2 жыл бұрын

Nice video sir.God bless you🙏

@SkanCityAcademy_SirJohn 2 жыл бұрын

Amen.....

@ubaidkhan9232 2 жыл бұрын

Sir why you take all force in negative in first question

@SkanCityAcademy_SirJohn 2 жыл бұрын

that is so because all the forces were acting in the plane.

@YaaKonadu-e9r Жыл бұрын

Sir please for the first question, would you be wrong if you assume that all the forces pointing towards the origin is positive

@SkanCityAcademy_SirJohn Жыл бұрын

No please you won't be wrong. Actually, you are going to get the same answer at the end.

@SkanCityAcademy_SirJohn Жыл бұрын

Where do you school

@YaaKonadu-e9r Жыл бұрын

@@SkanCityAcademy_SirJohn KNUST

@YaaKonadu-e9r Жыл бұрын

@@SkanCityAcademy_SirJohn but the direction will be different or...

@SkanCityAcademy_SirJohn Жыл бұрын

Oh okay. When are you guys writing basic mechanics?

@BlessedMireku 8 ай бұрын

If u negate the 3 Do u Also have to negate the force for f3

@SkanCityAcademy_SirJohn 8 ай бұрын

Ideally no, that is when the force is moving out of the origin, with that you don't negate the force. But in this case, the force is directed into the origin making it negative, and x is negative in the 2nd q, hence that will also be negative.

@ahallyahhaskins8140 Жыл бұрын

hello Sir, why didn't you use the 45 degree angle for F1

@SkanCityAcademy_SirJohn Жыл бұрын

The reason is, im taking my reference from the positive x axis, which means that I need to move anti-clockwise from +x to meet the line of action of the force and that is 315, which is better compared to using the same angle. 45, because in addition, you need to know which quadrants are sine and cosine either positive or negative, trying to memorize that is another stress on it own

@ahallyahhaskins8140 Жыл бұрын

Thank you very much sir🙏

@kelvinkwawafful4649 9 ай бұрын

But then if I use the 45 I will not be wrong right

@SkanCityAcademy_SirJohn 9 ай бұрын

You can use it provided that you can always remember which quadrant is sine and cosine either positive or negative

@ubaidrajput3703 8 ай бұрын

Is there any other method to solve this.... Or only this one?

@SkanCityAcademy_SirJohn 8 ай бұрын

There are a lot of them. The simplest is what I've explained here.

@sediqueodoom8206 8 ай бұрын

Please in the first question why are the forces we began working with are negative

@SkanCityAcademy_SirJohn 8 ай бұрын

They are negative because they are directed into the origin O

@ubaidrajput3703 8 ай бұрын

@@SkanCityAcademy_SirJohnif we take them as positive... Will there be any issue?

@ALBERTAHIADIFE-gx3do 8 ай бұрын

I'm totally at sea, cause i hardly see the question and everything you're solving.

@SkanCityAcademy_SirJohn 8 ай бұрын

Sorry about that, kindly hit the square icon at the bottom right of your screen when watching the video to maximize it, or watch on a bigger device. Sorry about that once again

@sambillafranklin8156 9 ай бұрын

I Keep getting confused on how you add those negatives cause i add and you dont add and sometimes i dont add and relize you added a negative

@SkanCityAcademy_SirJohn 9 ай бұрын

Can you explain it well so that I help you out?

@sambillafranklin8156 9 ай бұрын

Sometimes you add negative to the final answer because it is in the direction of either the negative x-ais or y-axis, For this example in particular i added a negative to the y value of f2 but you didn't so i became confessed @@SkanCityAcademy_SirJohn

@SkanCityAcademy_SirJohn 9 ай бұрын

It's very simple. When the forces are directed away from the origin, they are positive, when directed in or into the origin they are negative, by origin, I mean point O

@sambillafranklin8156 9 ай бұрын

Thanks a lot you are one in a million @@SkanCityAcademy_SirJohn