1. (10 Points) A mass of 10,000 kg with charge plus one is blocked against a mas
ID: 2033025 • Letter: 1
Question
1. (10 Points) A mass of 10,000 kg with charge plus one is blocked against a mass of 25 kg, also with charge plus one. (Like charges repel.) Nothing is moving. The blocks are released and the masses fly apart. The smaller mass goes at 2000 m/s. What is the velocity of the larger mass? 2. (10 Points) A 50 ton tank with a shield (108 Ibs) is shown in the figure. It is motionless. A 500 lb projectile is fired with a muzzle velocity of 3000 ft/sec. It strikes the shield, does not penetrate, but fuses with it. The tank is initially motionless Sbield Gun a. What is the momentum of the combination system after fusion? b. What is the velocity of the tank immediately after the firing?Explanation / Answer
Q1.
let speed of the larger mass is v and in opposite direction to the smaller mass.
total momentum of the two mass system will be conserved.
hence applying conservation of momentum principle:
initial momentum=final momentum
==>0=25*2000-10000*v
==>v=25*2000/10000=5 m/s
hence velocity of larger mass is 5 m/s and in opposite direction to that of the smaller mass.
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