Question
Asked Dec 10, 2019
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A large cruise ship of mass 6.00 x 10' kg has a speed of 10.4 m/s at some instant.
(a) What is the ship's kinetic energy at this time?
3245000000 J
(b) How much work is required to stop it? (Give the work done on the ship. Include the sign of the value in your answer.)
(c) What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.00 km?
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A large cruise ship of mass 6.00 x 10' kg has a speed of 10.4 m/s at some instant. (a) What is the ship's kinetic energy at this time? 3245000000 J (b) How much work is required to stop it? (Give the work done on the ship. Include the sign of the value in your answer.) (c) What is the magnitude of the constant force required to stop it as it undergoes a displacement of 2.00 km?

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Expert Answer

Step 1

Given data:

Mass of the ship, m = 6.00 x 107 kg.

Speed of the ship, v1 = 10.4 m/s

Step 2

(a)

The kinetics energy of the ship:

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K.E, = -mv; x 6.00 x10' ×(10.4) 2 = 324.48 x10' J

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Step 3

(b)

Speed of the ship, v2 = 0 m/s

From the work energy theorem:

...

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–mv - ту; — 0 —324.48х10" — - 324.48 х10 J

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