A box is held at rest by two ropes that form 30° angles with the vertical. The tension T in either rope is 42 N. What is the wei ght (w) of the box?
36 N
79 N
86 N
73 N
62 N
1 answer:
<h3><u>Answer;</u></h3>
= 73 N
<h3><u>Explanation</u>;</h3>
Using the formula
2 T cos(30°) = w
Where; T is the tension on each string, while w is the weight of the box given by mg
Therefore;
W = 2Tcos 30°
= 2 × 42 cos 30°
= 84 cos 30°
= 72.74
<u> ≈ 73 N </u>
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