180A_ch8_68a_BP

# 180A_ch8_68a_BP - Physics 180A Chapter 8 Problem 68...

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Chapter 8 Problem 68 Solution A rifle bullet with mass 8.00 g strikes and embeds itself in a block with a mass of 0.992 kg that rests on a frictionless, horizontal surface and is attached to a coil spring. The impact compresses the spring 15.0 cm. Calibration of the spring shows that a force of 0.750 N is required to compress the spring 0.250 cm. (30 pts) What kind of collision is this? (2 pts) What is the value of the spring constant k? (2 pts) Momentum Before Momentum After (2 pts) After bullet enters block Energy Before Energy After spring is compressed. (2 pts) Conservation of Momentum (2 pts) mom. before = mom. after Conservation of Energy (2 pts) energy before = energy after = Solve for the initial speed of the bullet then plug in given values? (4 pts) Solve for the magnitude of the bullet-block velocity just after impact then plug in the given values? (4 pts) Problem 2pts How much energy was lost (transformed) in this collision? (4 pts) Energy Before bullet enters block. (2 pts)

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180A_ch8_68a_BP - Physics 180A Chapter 8 Problem 68...

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