jperez94
Feb29-04, 12:36 PM
Hey there, I'm lost with this one:
Two 3-kg masses have velocities v(1)= 2m/s i-hat plus 3m/s j-hat and v(2)= 4m/s i-hat minus 6m/s j-hat. Find the velocity of the center of mass of the system.
Now, I know how to go about calculating the velocity of the center of mass (v(cm)= m(1)V(1)+m(2)V(2)/m(1)+m(2)
The thing that throws me off is the j-hats and i-hats. How do I come out with a vector number? I thought of the pothagarem(sp?) therom, but decided that couldnt work. Any ideas? Thanks.
Two 3-kg masses have velocities v(1)= 2m/s i-hat plus 3m/s j-hat and v(2)= 4m/s i-hat minus 6m/s j-hat. Find the velocity of the center of mass of the system.
Now, I know how to go about calculating the velocity of the center of mass (v(cm)= m(1)V(1)+m(2)V(2)/m(1)+m(2)
The thing that throws me off is the j-hats and i-hats. How do I come out with a vector number? I thought of the pothagarem(sp?) therom, but decided that couldnt work. Any ideas? Thanks.