Background info: Two friends are trying to decide how long their ladder should be for the zip line they are building. There are
two choices: 40ft or 25ft
i chose 40ft. the ladder is leaning against the tree at a 75 degree angle. i need to fill in the missing angles, but am stuck. pls help ;(
i chose 40ft. the ladder is leaning against the tree at a 75 degree angle. i need to fill in the missing angles, but am stuck. pls help ;(
1 answer:
You might be interested in
Answer:
(4, -2) (see attached)
Step-by-step explanation:
Vector addition on a graph is accomplished by placing the tail of one vector on the nose of the one it is being added to. The negative of a vector is in the direction opposite to the original.
__
<h3>vector components</h3>The components of the vectors are ...
u = (1, -2)
v = (-6, -6)
Then the components of the vector sum are ...
2u -1/3v = 2(1, -2) -1/3(-6, -6) = (2 +6/3, -4 +6/3)
2u -1/3v = (4, -2)
<h3>graphically</h3>The sum is shown graphically in the attachment. Vector u is added to itself by putting a copy at the end of the original. Then the nose of the second vector is at 2u.
One-third of vector v is subtracted by adding a vector to 2u that is 1/3 the length of v, and in the opposite direction. The nose of this added vector is the resultant: 2u-1/3v.
The resultant is in red in the attachment.
