Collisions

EXERCISES AND PROBLEMS

EXERCISES  AND PROBLEMS ssm Solution is in the Student Solutions Manual. www Solution is available on the World Wide Web at: http://www.wiley.comlcollege/hrw Ilw Solution is available on the Interactive LeamingWare Impulse and Linear Momentum 1A cue stick strikes a stationary pool ball. with an average force 50 N over a time of 10 ms. If the …

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REVIEW & SUMMARY

REVIEW & SUMMARY Collisions In a collision, two bodies exert strong forces on each other for a relatively short time. These forces are internal to the two-body system and are significantly larger than any external force during the collision. Impulse and Linear Momentum Applying Newton’s second law in momentum form to a particle-like body involved in a collision leads to …

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Sample Problem

Sample Problem Two skaters collide and embrace, in a completely inelastic collision. Thus, they stick  together after as suggested. (a) What is the velocity V of the couple after they collide? SOLUTION: One Key Idea here is the assumption that the two skaters form a closed, isolated system. (b) What is the velocity  of the center of …

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Sample Problem

Sample Problem Two metal spheres, suspended by vertical cords, initially just touch, as shown in . Sphere  with mass m, = 30 g, is pulled to the left to height hI· = 8.0 em, and then released from rest. After swinging down, it undergoes an elastic collision with sphere 2, whose mass 2 = 75 g. What is the …

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Moving Target

Moving Target Now that we have examined the elastic collision of a projectile and a stationary target, let us examine the situation in which both bodies are moving before they undergo an elastic collision. Note that the assignment of subscripts 1 and 2 to the bodies is arbitrary. If we exchange those subscripts in, we end up with the …

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Sample Problem

Sample Problem A karate expert strikes downward with his fist (of mass ml 0.70 kg), breaking a 0.14 kg board . He then does the same to a 3.2 kg concrete block. (a) Just before the object (board or block) breaks, what is the energy stored in it? SOLUTION: The Key Idea here is that we can treat …

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Sample Problem

Sample Problem The ballistic pendulum was used to measure the speeds of bullets before electronic timing devices were developed. The version shown in Fig. 10-11 consists of a large block of wood of mass M = 5.4 kg, hanging from two long cords. A bullet of mass m = 9.5 g is fired into the block, coming quickly to …

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