Posted by **Colin** on Sunday, January 20, 2013 at 3:22pm.

Vector A has a magnitude of 5.00 units, vector has a magnitude of 5.00 units, and the dot product A·B has a value of 16. What is the angle between the directions of A and ?

- Physics -
**Elena**, Monday, January 21, 2013 at 4:03pm
A•B= |A||B| cosα

cosα =A•B/ |A||B|=

=16/5•5=0.64

α=cos⁻¹α=50.2°

- Physics -
**Rachel**, Tuesday, January 29, 2013 at 7:40pm
A person walks in the following pattern: 2.8 km north, then 2.7 km west, and finally 6.9 km south. Construct the vector diagram that represents this motion and from it judge how far and in what direction a bird would fly in a straight line from the same starting point to the same final point. (Choose east as the +x direction.)

## Answer this Question

## Related Questions

- Physics - Vector A has a magnitude of 5.00 units, vector B has a magnitude of 9....
- Physics - Vectors - Vector A has a magnitude of 2.2 units, vector B has a ...
- physics - Vector vector A has a magnitude of 6.90 units and makes an angle of 46...
- Physics - 1. Two points in a plane have polar coordinates (2.5 m, 30 degrees) ...
- Calculus - Dot Product - consider a rhombus ABCD a) find the resultant of vector...
- Physics - Vector has a magnitude of 8.10 units and makes an angle of 52.0° with...
- precalc - If is vector a ia 7 units long, the magnitude of vector b is 10 units ...
- Physics - Use the definition of scalar product( vector A* vector B = abcos theda...
- physics - The magnitude of vector A is 18 units at an angle of 90 degrees with ...
- AP physics - Vector A has a magnitude of 8.00 units and makes an angle of 45.0° ...