2. (Dynamics and Momentum) A 2.0-kg cart travels at 5.0 m/s [E], then collides with an 8.0-kg block that is initially stationary. The collision between the cart and the block is perfectly elastic. a. Determine the velocities of the cart and block after the collision. [2 marks] b. Calculate the impulse on the 8.0-kg block. [1 mark] c. If the carts were in contact for 0.20 seconds, determine the average force on the 8.0-kg block. [1 mark] d. Determine the average acceleration of the 8.0-kg block in this time. [1 mark]