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ss7ja [257]
3 years ago
13

19. A 0.0340 kg bullet traveling at 120 m/s embeds itself in a 1.24 kg wooden block which

Physics
1 answer:
Blababa [14]3 years ago
3 0

Answer: x ≈ 36.3 cm

Explanation:

Conservation of momentum during the collision

0.0340(120) + 1.24(0) = (0.0340 + 1.24) v

v = 3.2025 m/s

The kinetic energy of the block/bullet mass will convert to spring potential

½kx² = ½mv²

x = √(mv²/k)

x = √(1.274(3.2025²) / 99.0)

x = 0.363293... ≈ 36.3 cm

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Answer: The increase in temperature of the nail after the three blows is 8.0636 Kelvins. The correct option is (d).

Explanation:

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Half of the kinetic energy of the hammer is transformed into heat in the nail.

Energy transferred to the nail in one blow =

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Total energy transferred after 3 blows,Q =3\times 18.0625 J=54.1875 J

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2 years ago
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olga2289 [7]
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