Question

the scalar product of two vectors 2N,4N is 4 angle between them

Answer 1

Answer:

60°

Explanation:

The scalar product of two vectors with an angle ∅ between them is defined as:

$\overrightarrow{a}\cdot \overrightarrow{b}=|a||b|cos\phi$

Solving for angle ∅:

$\phi= cos^{-1}(\frac{\overrightarrow{a}\cdot \overrightarrow{b}}{|a||b|})=cos^{-1}(\frac{4}{8})$