A man steps out of a plane at a height of 4000 m above the ground, falls 2000 m very quickly, and then opens his parachute and slowly falls the
remaining 2000 m to the ground. What height above the ground would be the
best choice for a reference point?
O A. 6000 m
OB. 4000 m
C. Om
OD. 2000 m

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

the components of a vector are the parts of the vectors that are to each other.

b perpendicular