7. A 5.20 g bullet moving at 672 m/s strikes a 700 g wooden block at rest on a rictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 428 m/s. (a) What is the resulting speed of the block? (b) What is the speed of the bullet-lock center of mass?
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- the right. They undergo a head-on elastic collision and each returns, retracing its original path. Find the final speeds of the particles. (Enter your answers in terms of v;, the initial speed of each mass.) Two blocks with masses 6m and 9m are on a collision course with the same initial speeds v;. The block with mass 6m is traveling to the left, and the 9m block is traveling to V6m,f - V; V9m,f V; %3D Need Help? Read ItA hockey puck is traveling forward at 30.3 m/s when it makes a head-on one-dimensional elastic collision with a safety cone of unknown mass, initially at rest. After the collision the hockey puck bounces backward witha velocity of -19.8 m/s. What is the final speed of safety cone? A) -10.5 m/s (B) 22.9 m/s 10.5 m/s (D) 50.1 m/sA .015 kg bullet is fired at a 1.5 kg block initially at rest. The bullet, moving with an initial speed of 500 m/s emerges from the block with a speed of 400 m/s. What's the speed of block after collission?
- Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 14.0 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick together, leaving parallel skid marks at an angle of 65.0° north of east. Determine the initial speed v2i of the northward-moving vehicle. m/sThe speed limit for both roads is 35 mi/h and the driver of the northward-moving vehicle claims he was within the speed limit when the collision occurred. Is he telling the truth? YesNoA 2.7 kg block of wood sits on a frictionless table. A 3.0 g bullet, fired horizontally at a speed of 500 m/s, ges completely through the block, emerging at a speed of 220 m/s. What is the speed of the block immediately after the bullet exits?A bullet has a mass of .01k kg and is fired from a gun with an unknown speed of v. The bullet strikes a stationary block that has a mass of 2.5 kg. The bullet + block swing in an arc to a height of .65 meters above the initial position. Find the initial velocity of the bullet.
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