wats the equation for tension?

Question

please help thanks

Answer 1

tension (Ft) on a string when:
1- it holds a body of weight (Fg) so the tension would be equals the weight and the equation will be:
Ft = Fg

2- if the body is pulled upward the tension would increase by (ma)where
m: is the mass of the body and
a: the acceleration of moving downward, the equation would be:
Ft = Fg + ma
NOTE: if the acceleration is too high the tension may increase and string till a critical value and the sting will cut

3- if the body is pulled downward the tension would decrease by (ma) where
m: is the mass of the body and
a: the acceleration of moving downward, the equation would be:
Ft = Fg - ma
NOTE: The acceleration may be equals g=9.8 m/s^2 so the
Ft = Fg - mg
Ft = 0
There is no tension (i.e. the body is weightless)
Hint: you may use a yo-yo to verify this equation

Answer 2

Tension Formula

Answer 3

Actually the real formula for tension is in fact

T= absolute value of (mg-ma)

In other words its apparent weight

Answer 4

Since Tension is really a force, the equation is
F=ma

That is why if an object is pulled with 2 equal tensions on opposite sides, the object will remain motionless, since the forces cancel out and therefore there's no acceleration.

I hope that works.

Answer 5

It's usually the force on the string, unless you mean voltage in which case it is IR.

Answer 6

It has no common formula or equation

Answer 7

Ohm's law V =RI

where V = tension, I current, R resistance

Answer 8

Tension is a force.

And the question - What is the equation of force? - makes no sense.

There is no equation for force.