Question

Question #662e2

Answer 1

For tension in an extensible string,

`T=(lambdax)/l_0`

`T` is tension
`lambda` is the modulus or elasticity,
`x` is the extension
`l_0` is the original length,

Don't stick to the variables(`lambda` `x` `l_0`) but rather to their meanings. I say this because these letters may vary in different textbook. Okay?

For tension in a spring,

`T = kx`

`T` is tension
`k` is the spring constant
`x` is the extension

The Difference between force and torque
1)
Force, `F = ma`
Torque, `T= Fs`

`F` means force
`m` is mass
`a` acceleration
`T` means torque
`s` is the perpendicular distance of the force from the axis of rotation

2)
A force is a simple push or pull. If a single force where to act on an object, then the magnitude of that force would be equal to its mass times its acceleration.

On the other hand, a torque is a measure of the turning effect that forces produce on objects(Torque = moment).

For example, if you and I would climb on a sea-saw then our weights(the force) would produce a moment or torque that causes the seesaw to move in a clockwise or anti clockwise manner at different times.