Question

4. Three forces 10N, 10N and 10N act at 0°, 60°
and 120 with the x-axis. Then their
resultant is
1) 10N
2) 20N
3) 30N
4) 25N​

Answer 1

Answer:

hope u like this solution

Answer 2

Answer:

The correct answer is Option A i.e. 10N.

Explanation:

Projection of 10N force at 0° across x-axis: 10 N

Projection of 10N force at 60° across x-axis: 10.cos60° N

Projection of 10N force at 120° across x-axis: -10.cos60° N

Hence,

Resultant force across x-axis

= (10 + 10.cos60° - 10cos60°) N

= 10 N

Hence, the answer is Option A i.e. 10N.

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