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Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford
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Answer: CALC A 3.00-kg fish is attached to the lower end

Chapter 7, Problem 73P

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QUESTION:

Problem 73P

CALC A 3.00-kg fish is attached to the lower end of a vertical spring that has negligible mass and force constant 900 N/m. The spring initially is neither stretched nor compressed. The fish is released from rest. (a) What is its speed after it has descended 0.0500 m from its initial position? (b) What is the maximum speed of the fish as it descends?

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QUESTION:

Problem 73P

CALC A 3.00-kg fish is attached to the lower end of a vertical spring that has negligible mass and force constant 900 N/m. The spring initially is neither stretched nor compressed. The fish is released from rest. (a) What is its speed after it has descended 0.0500 m from its initial position? (b) What is the maximum speed of the fish as it descends?

ANSWER:

Solution 73P

Step 1:

Height of the fish from the ground, h = 0.05 m

Therefore, the potential energy of the fish due to gravitational force can be calculated.

U = mgh

Where, m - mass of the fish

           g - Acceleration due to gravity

           h - Height of the fish from the ground

Provided, mass of the fish, m = 3.00 kg

Therefore, U = 3 kg × 9.8 m/s2 × 0.05 m = 1.47 J

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