In a ballistics test, a bullet traveling horizontally at goes through a 30-cm-thick 350 kg stationary target and emerges with a speed of . The target is free to slide on a smooth horizontal surface. What is the target’s speed just after the bullet emerges?
The target's s speed just after the bullet emerges is
Mass of bullet,
Initial velocity of the bullet,
Mass of stationary target,
Final Velocity of the bullet,
Applying the conservation of momentum,
A 100 g ball moving to the right at 4.0 m/s collides head-on with a 200 g ball that is moving to the left at 3.0 m/s.
a. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?
b. If the collision is perfectly inelastic, what are the speed and direction of the combined balls after the collision?
You are part of a search-and-rescue mission that has been called out to look for a lost explorer. You’ve found the missing explorer, but, as FIGURE P11.50 shows, you’re separated from him by a -high cliff and a -wide-raging river. To save his life, you need to get a 5.0 kg package of emergency supplies across the river. Unfortunately, you can’t throw the package hard enough to make it across. Fortunately, you happen to have a 1.0 kg rocket intended for launching flares. Improvising quickly, you attach a sharpened stick to the front of the rocket so that it will impale itself into the package of supplies, then fire the rocket at ground level toward the supplies. What minimum speed must the rocket have just before impact in order to save the explorer’s life?
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