What is tension (AS maths f=ma)?

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Bertybassett
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Hi, I'm not sure what tension refers to in f=ma questions? is it literally just the forces in the direction of the wire? Also, if we are given tension as well as the resistive forces (in the same direction e.g. resistive forces might include air resistence etc), is resistive forces included in tension? Many thanks
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Cashifetutors
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Tension is the force within the wire which opposes the weight acting in the opposite direction (usually mg but be careful as the equation changes if an angle is considered).
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Pangol
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(Original post by Bertybassett)
Hi, I'm not sure what tension refers to in f=ma questions? is it literally just the forces in the direction of the wire? Also, if we are given tension as well as the resistive forces (in the same direction e.g. resistive forces might include air resistence etc), is resistive forces included in tension? Many thanks
Tension is the name for the force in a string/rope/wire/etc. If you were hanging from a rope, your weight would be pulling you down, so there must be a force in the rope that is equal in magnitude and opposite in direction so that you can just hang there - that is the tension.

There may be other forces acting in the same direction as the tension in a particular question, but they would not (necessarily) be tensions themselves.
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RDKGames
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(Original post by Bertybassett)
Hi, I'm not sure what tension refers to in f=ma questions? is it literally just the forces in the direction of the wire? Also, if we are given tension as well as the resistive forces (in the same direction e.g. resistive forces might include air resistence etc), is resistive forces included in tension? Many thanks
It's the force that is contained in a string/rope/etc...

If you have two particles O---------------O joined by a string there such that it is taut, then there is tension acting to the right for the left particle, and there is an equivalent tension force acting to the left for the right particle. Both tension directions are along the string.

You cannot have any other forces 'inside' tension since tension is itself a force. A force inside a force doesn't make much sense.
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