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You're fishing from a tall pier and have just caught a 1.3 kg fish. As it breaks the surface, essentially at rest, the tension in the vertical fishing line is 16 N.
Use work and energy to find the fish's upward speed after you've lifted it 2.0 m?

Sagot :

Answer:

Explanation:

Work completed by the line

W = Fd = 16(2.0) = 32 J

Change in potential energy

PE = mgh = 1.3(9.8)(2.0) = 25.48 J

Kinetic energy is work minus potential energy increase

KE = 32 - 25.48 =  6.52 J

KE = ½mv²

v = √(2(KE)/m) = √(2(6.52)/1.3) = 3.167138... = 3.2 m/s

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