Dot Products of Vectors Practice and Answers 100% Pass

Dot Products of Vectors Practice
Find the work done by a force F of 21 pounds acting in the direction (2,5) in moving an
object 7 feet from (0,0) to (7,0). - ANSWER-a. 54.59 foot-pounds

Find a b if a =(4,3) and b = (4,5) - ANSWER-A. 31

Use the dot product to find v when v = (2,7). - ANSWER-d

A constant force of F = (23,33)moves an object along a vector D = (20,18), where units
are in pounds and feet. Find the work done. - ANSWER-c. 1054 foot-pounds

Write the vector u as a sum of two orthogonal vectors, one of which is the vector
projection of u onto v, projvu
U=(-6,8) V=(7,1) - ANSWER-D

Write the vector u as a sum of two orthogonal vectors, one of which is the vector
projection of u onto v, projvu
U=(-9,3) V=(-9,-3) - ANSWER-A

Find the angle between u = (8,-3)and v = (-3,8). Round to the nearest tenth of a degree.
- ANSWER-B 90*

Find the angle between the given vectors to the nearest degree. - ANSWER-c. 108.4

Find the angle between u =i+sqet7i and v = -i+9j . Round to the nearest tenth of a
degree. - ANSWER-b 27.0

Use the dot product to find v when v = (7,24) - ANSWER-A 25