6) The figure shows block 1 (with velocity 10 m/s) sliding into a stationary block 2 (mass m2 = 6.0 kg), block 1? which ends up with a velocity of v2f= 5.0 m/s. The collision is elastic. What is the final velocity (m/s) of m 1 mg a) 3.0 b) 0 C) -8.4 d) -5.0 e) 1.3 f) 2.1 g) -4.0 h) 4.4 1) -3.0 j) -1.8 two frictionless water slides as shown in d