A 320-g air track cart traveling at 1.25 m/s collides elastically ...

[misspop]

A 320-g air track cart traveling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 320-g cart after the collision?
 
  A) 0.678 m/s
  B) 0.106 m/s
  C) 0.212 m/s
  D) 1.36 m/s
  E) 1.14 m/s

Question 2

A uniform solid sphere is rolling without slipping along a horizontal surface with a speed of 5.50 m/s
 
  when it starts up a ramp that makes an angle of 25.0 with the horizontal. What is the speed of the sphere after it has rolled 3.00 m up the ramp, measured along the surface of the ramp?
  A) 4.01 m/s
  B) 8.02 m/s
  C) 1.91 m/s
  D) 2.16 m/s
  E) 3.53 m/s

[Mollythedog]

Answer to Question 1

B

Answer to Question 2

E

[misspop]

Wow, this really help

[at]

Gracias!