A0.75 kg model car is moving west at a speed of 9.0 m/s when it collides head-on with a 2.00 kg model truck that is traveling east at a speed of 10.0 m/s. after the collision, the 0.75 kg model car is now moving east at 11 m/s. what is the speed and direction of the model truck after the collision?

a.
9.3 m/s east
c.
2.5 m/s east
b.
9.3 m/s west
d.
2.5 m/s west