- #1
ttttrigg3r
- 49
- 0
http://session.masteringphysics.com/problemAsset/1007938/22/6318.jpg
Two cars, both of mass m, collide and stick together. Prior to the collision, one car had been traveling north at speed 2v, while the second was traveling at speed v at an angle phi south of east (as indicated in the figure). After the collision, the two-car system travels at speed v_final at an angle theta east of north.
Now I solved Vfinal into its i and j components
i: vicos[itex]\phi[/itex]=2vfcos[itex]\theta[/itex]
j: 2vi-sin[itex]\phi[/itex]vi=2(vfsin[itex]\theta[/itex])
The problem is if I solve for vfinal, I get the answer in terms of Vinitial, phi, and theta. The problem only asks for Vfinal in Vinitial and theta. How do I get rid of phi to only have theta and Vi?
Two cars, both of mass m, collide and stick together. Prior to the collision, one car had been traveling north at speed 2v, while the second was traveling at speed v at an angle phi south of east (as indicated in the figure). After the collision, the two-car system travels at speed v_final at an angle theta east of north.
Now I solved Vfinal into its i and j components
i: vicos[itex]\phi[/itex]=2vfcos[itex]\theta[/itex]
j: 2vi-sin[itex]\phi[/itex]vi=2(vfsin[itex]\theta[/itex])
The problem is if I solve for vfinal, I get the answer in terms of Vinitial, phi, and theta. The problem only asks for Vfinal in Vinitial and theta. How do I get rid of phi to only have theta and Vi?