Plhysics help?

Question

1.> Two air track carts move toward one another on an air track. Cart 1 has a mass of 0.53 kg and a speed of 0.9 m/s. Cart 2 has a mass of 0.56 kg.
(a) What speed must cart 2 have if the total momentum of the system is to be zero?

(b) Since the momentum of the system is zero, does it follow that the kinetic energy of the system is also zero?
yes or no
(c) Verify your answer to part (b) by calculating the system's kinetic energy.

2.> A honeybee with a mass of 0.175 g lands on one end of a popsicle stick. After sitting at rest for a moment, the bee runs toward the other end with a velocity 1.29 cm/s relative to the still water. What is the speed of the 4.65 g stick relative to the water? (Assume the bee's motion is in the negative direction.

Answer 1

a) 0.52*0.9-0.56*v2=0
v2=0.836 m/s

b) no
.5*m*v^2
c) .5*0.52*0.9^2+.5*0.56*(-0.836)^2
0.406 J

2) Assuming no friction
=-0.175 *1.29+4.65 * V2=0
v2=0.0485 cm/s

j