Practice Problems

Practice Problems - of 2.2 m/s. How much thermal energy due...

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Practice Problems PHYS 1403 These problems are for your practice. There is no due date, but you might want to consider working them before the next exam. 1. A 9300 kg boxcar traveling at 15.0 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 m/s. What is the mass of the second car? 2. 3. A 0.40 kg ball is thrown with a speed of 12 m/s at an angle of 33º. What is its speed at its highest point, and how high does it go? Use conservation of energy and ignore air resistance. 4. 5. A 21.7 kg child descends a slide 3.5 m high and reaches the bottom with a speed
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Unformatted text preview: of 2.2 m/s. How much thermal energy due to friction was generated in this process? 6. 7. An internal explosion breaks an object, initially at rest, into two pieces, one of which has 1.5 times the mass of the other. If 7500 J were released in the explosion, how much kinetic energy did each piece acquire? 8. 9. A 23 g bullet traveling 230 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 170 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?...
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