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olga55 [171]
2 years ago
11

The ball in this activity could reach much greater speeds if not for the loss of energy in many different transformations. There

is one major energy loss that is causing the ball to move more slowly, what is that energy? What force is acting upon the ball to create this loss of energy?
Please help quick!

Physics
1 answer:
harkovskaia [24]2 years ago
3 0

Answer:

friction acts upon the ball when it is sliding down the slide and this action creates thermal energy

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A weightlifter lifts a 1250-N barbell 2 m in 3 s.How much power was used to lift the barbell?
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The power is 833.3 W

Explanation:

First of all, we need to calculate the work done in lifting the barbell, which is equal to the change in gravitational potential energy of the barbell:

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