A stone Q is tied to a point P vertically above Q by an inelastic string of length 2 meters. How high does the stone rise when the string is inclined at an angle 60o to the vertical?
-
A.
It does not rise -
B.
2(sqrt{3}) meters -
C.
3 meters -
D.
1 meters -
E.
3
Correct Answer: Option D
Explanation
Cos 60o = (frac{PD}{2})
Cos 60o x 2 = 0.5 x 2
= 1m