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Homework Statement
Two particles move in opposite directions along a straight line. Particle 1 of mass m1 = 23 kg at x1 = 16 m moves with a speed v1 = 34 m/s (to the right), while the particle 2 of mass m2 = 64 kg at x2 = −25 m moves with a speed v2 = −43 m/s (to the left). Given: Counterclockwise is the positive angular direction.
1)What is the total angular momentum of the system about the zaxis relative to point A along y axis if d1 = 13 m? Answer in units of kgm2/s.
2) What is the total angular momentum of the system about the zaxis relative to point B along y axis if d2 = 22 m? Answer in units of kgm2/s.
m1 = 23
Position1 = {16 i, 0 j, 0 k}
v1 = {34 i, 0 j, 0 k}
m2 = 64
Pos2 = {25 i , 0 j, 0 k}
v2 = {43 i, 0 j, 0 k}
d1 = {0 i, 13 j, 0 k}
d2 = {0 i, 22 j, 0 k}
Homework Equations
L = Position [tex]\times[/tex] m v
The Attempt at a Solution
I got number 1 correct, and number 2 should be the same. however just changing d1 to d2 does not give the correct answer.
1)
{16, 0 , 0} + {0, 13, 0} = {16, 13, 0}
{25 , 0, 0}+ {0, 13, 0} = {25, 13, 0}
{16, 13, 0} [tex]\times[/tex] (23 {34 , 0 , 0 }) +
{25, 13, 0} [tex]\times[/tex] (64 {43 , 0 , 0 }) = {0, 0, 25610} = 25610 k
2) should be the same but I get {0, 0, 43340} which is incorrect
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