Answer to Question #247452 in Physics for Bley

Question

Dot or scalar Product

1. Calculate the dot product of vectors a and b where a is 4 units and b is 8 units and angel theta is 67

Answer 1

The dot products is

$$\textbf a·\textbf b=|\textbf a|·|\textbf b|\cos\theta=4·8·\cos67°=12.5.$$