vectors

Question 1

force required to keep x from rolling down the hill

Answer 1

, then find unit vector , projection

Question 2

find vertical component of vector v with magnitude x and direction angle 0

Answer 2

xsin(angle)

Question 3

resultant vector

Answer 3

add two vectors together

Question 4

writing u as the sum of two orthogonal vectors

Answer 4

find projection, then subtract projection from original vector