How long is a peice of string?

[wayfriend]

java.lang
Class String

length

public int length()

• Returns the length of this string. The length is equal to the number of Unicode code units in the string.
  
  Specified by:
  • length in interface CharSequence
  
  Returns:
  • the length of the sequence of characters represented by this object.

[sgt.null]

it is.

[deer of the dawn]

1. The problem statement, all variables and given/known data
In this case how tights a peice of wire with a ball, at one end and a pivot P at the other. A wire from the pivot P suspends a ball, m.

Problem:Find T(r) for the values of m, v and g (in terms of r).



2. Relevant equations

The tension or force in the wire, T, when the ball m is swinging through the lowest point is given by the function:

T(r)=mg+(mv^2/r) where m=1.0 kg, v=7.75 ms–1, g = 9.81 ms-2 T is in Newtons

r is the disrance from the pivot P to the centre of the ball when the wire is stretched.When the wire is not stretched, its length is 2.89m.




3. The attempt at a solution

0=mg+(mv^2/r)
-mg=mv^2/r)
-mg(r)=mv^2
r=-mv^2/mg therefore r=-1x7.75^2/1x9.81 =-6.123m 3dp

Just wondering if Im on the right track here I dont see how r could be a negative number and if not how can it be twice the length when stretched?

It kind of cracks me up that people are so intelligent that their answers are complete gibberish.

[sgt.null]

[sgt.null]

[Cord Hurn]

The string is just long enough to attach a toy on one end and drag it out of my cat's sight around the corner and entice the cat to follow.

[sgt.null]

The  literal meaning of this question
can have no definite answer as no
one can determine the exact length
of a piece of string as everyone might
possess a different length. The piece
of string can be as long as 10,000 feet
or as short as just 6 inches.

[Cord Hurn]

Well, I prefer it be five feet long, not a bit more, or less.

[sgt.null]

string is as string does