Two vectors and are given by and . The scalar product of and a third vector is −16. The scalar product of and is +18. The z component of is 0. What is the magnitude of ?
A) 7.8
B) 6.4
C) 3.6
D) 5.0
E) 4.8

Question

Two vectors  and  are given by  and  . The scalar product of  and a third vector  is −16. The scalar product of  and  is +18. The z component of  is 0. What is the magnitude of  ?
A) 7.8 
B) 6.4 
C) 3.6 
D) 5.0 
E) 4.8

Quizplus · Accepted Answer

The Answer of Two vectors  and  are given by  and  . The scalar product of  and a third vector  is −16. The scalar product of  and  is +18. The z component of  is 0. What is the magnitude of  ?
A) 7.8 
B) 6.4 
C) 3.6 
D) 5.0 
E) 4.8

Two Vectors and Are Given by and