Question

ce 750kg 60 4. Anthony and Sissy are participating in the "Roll-a-Rama" rollerskating dance 10 championship. While 75.0-kg Anthony rollerskates backwards at 3.0 m/s, 60.0-kg Sissy jumps into his arms with a velocity of 5.0 m/s in the same direction. a) How fast does the pair roll backwards together? b) If Anthony is skating toward Sissy when she jumps, would their combined final velocity be larger or smaller than your answer to part a? Why? ty be Bomb Answer: a. Answer: b. 5. To test the strength of a retainment wall designed to protect a nuclear reactor, a rocket-propelled F-4 Phantom jet aircraft was crashed head-on into a concrete barrier at high speed in Sandia, New Mexico, on April 19, 1988. The F-4 phantom had a mass of 19.100 kg, while the retainment wall's mass was 469,000 kg. The wall sat on a cushion of air that allowed it to move during impact. If the wall and F-4 moved together at 8.41 m/s during the collision, what was the speed of the F-4 Phantom upon impact? 169,000 to 841 My Answer:

Answer 1

9.) Alaply momentum conserration MAVA + m₂ Vs = 75x 3 + 60X5 = (15+6) | r= 3-88 ef / hug b) again apply momentum conservation MAVA - More = (math me)v 7583 – 60x5 = (75+60 3r (r= -0.55ke combinud final velocity will desagre because they are moving in opposite direction due to which nel momentum decreases. 5.) Happly momentum conservation melo = (upp + Mw)v 19100 y no = (19100+ 463,000) 8:41 [vo = 214.92 /