# college physics

A 280 g wood block is firmly attached to a very light horizontal spring, as shown in the figure . The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far beyond its equilibrium position will it stretch at its first maximum extension?

1. 👍 0
2. 👎 0
3. 👁 532
1. Figure the stored energy at the beginning (compressed 18 cm).

Figure the friction energy it loses as it slides x+18 cm (mg*mu*(x+.18)

final stored energy= 1/2 k x^2 solve for x.

base equation: final stored energy= initial stored energy + friction energy lost.

1. 👍 2
2. 👎 0
2. 30

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2. 👎 0
3. it must be = 0.17

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2. 👎 0

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