A small, 0.10 kg cart is moving at 1.68 m/s when it collides with a larger 1.66 kg cart at rest. After the elastic collision, the small cart recoils (i.e. bounces off the larger cart and travels in the opposite direction) at a speed of 0.78 m/s.

(a) What is the magnitude (absolute value) of the change in momentum for the small cart? kg m/s.

(b) What is the speed (absolute value of the velocity) of the larger cart after the collision? m/s.