A stone Q is tied to a point P vertically above Q by an inelastic...

JAMB 1982

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 60^o to the vertical?

A. It does not rise
B. 2\(\sqrt{3}\) meters
C. 3 meters
D. 1 meters
E. 3

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Correct Answer: Option D

Explanation

Cos 60^o = \(\frac{PD}{2}\)

Cos 60^o x 2 = 0.5 x 2

= 1m

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A stone Q is tied to a point P vertically above Q by an inelastic...

Correct Answer: Option D

Explanation

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