Posted by tami on .
Two objects are approaching an intersection. One is a 50 kg traveling at 8
m/s from east to west and the other is a 40 kg going from south to north at 12 m/s.
(a) Find the x and y components of the net momentum of this system.
(b) What are the magnitude and direction of the net momentum

physics 
Henry,
a. X = m1V1 = 50 * 8 = 400.
Y = m2V2 =40 * 12 = 480.
b. tanA = Y/X = 480/400 = 1.20.
Ar = 50.19 = Reference angle.
A = 50.19 + 180 = 129.8o = Direction.
Magnitude = X/cosA = 400/cos129.8 = 625.