Determine the magnitude of the friction force. 5.80 g lead, Ask an Expert

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Q. A rifle bullet with a mass of 11.0 g traveling toward the right at 247 m/s strikes a large bag of sand and penetrates it to a depth of 24.5 cm. Determine the magnitude of the friction force (assumed constant) that acts on the bullet.

Q. A 5.80 g lead bullet traveling at 460 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in temperature of the bullet?

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