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elena55 [62]
3 years ago
13

Can anyone help me with this please​

Physics
1 answer:
Anastasy [175]3 years ago
7 0

Answer:

1270 J

Explanation:

Recall that the mechanical energy of a system is the addition of the Potential energy and the Kinetic energy at any given time.

As the skier descends, potential energy is converted into kinetic energy, but the total mechanical energy should remain the same.

We see that it is not the case, so that difference is what has gone into thermal energy;  19500 J - 18230 J = 1270 J

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The fastest pitched baseball was clocked at 46 m/s. assume that the pitcher exerted his force (assumed to be horizontal and cons
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Using the Equation:
                                 v² = vi² + 2 · a · s    → Eq.1
where,
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<span><span>We know that vi = 0 because the ball was at rest initially.
</span><span>
Therefore,

Solving Eq.1 for acceleration,
 
</span></span> v² = vi² + 2 · a · s
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a = v ²/2·<span>s
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<span>Now applying Newton's 2nd law of motion,
 </span>
<span>F = ma
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