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Dahasolnce [82]
3 years ago
10

True or false this is for a test

Physics
2 answers:
OleMash [197]3 years ago
7 0

Answer:

true

Explanation:

____ [38]3 years ago
5 0

Answer:The answer is Ture

Explanation:

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The mass of the boy is 35 kilograms. What is the force of friction that slowed him down?
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A 15 kg mass is moving at 7.50 meters per second on a horizontal, frictionless surface. What is the total work that must be done
sashaice [31]
Kinetic energy = (1/2) (mass) x (speed)²

At 7.5 m/s, the object's KE is (1/2) (7.5) (7.5)² = 210.9375 joules

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The additional energy needed to speed the object up from 7.5 m/s
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That energy has to come from somewhere. Without friction, that's exactly
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