Question

A person of mass 40kg walks on a road He exerts a force of 40N and walks a distance of 10m.

What is the work done by the force of gravity​

Answer 1

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Answer 2

Step-by-step explanation:

sin45° × sin30° + cos 45° × cos 30°

\begin{gathered}( \frac{1}{ \sqrt{2} } \times \frac{1}{2}) + ( \frac{1}{ \sqrt{2} } \times \frac{ \sqrt{3} }{2)} \\ = \frac{1}{2 \sqrt{2} } \times \frac{ \sqrt{3} }{ 2\sqrt{2} } \\ = \frac{(1 + \sqrt{3)} }{2 \sqrt{2} } \end{gathered}

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