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3 years ago

13

An object with a mass of 70 kilograms is supported at a height of 8 meters above the ground, what's the potential energy of the

object with respect to the ground?

1 answer:

Olegator [25]3 years ago

6 0

Answer:

5488 Joules

Explanation:

Use the formula for the potential energy:

$E_p = mgh = 70kg\cdot 9.8\frac{m}{s^2}\cdot 8m = 5488 J$

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4 years ago

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The kinetic energy of a moving object is E=12mv2. A 61 kg runner is moving at 10kmh. However, her speedometer is only accurate t

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Answer:

$e=3367.2J$

% $e=1.43$ %

Explanation:

From the exercise we know two information. The real speed and the experimental measured by the speedometer

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Since the speedometer is only accurate to within 0.1km/h the experimental speed is

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Now, the potential error in her calculated kinetic energy is:

$e=E_{r}-E_{e}=(234023-230656)J=3367.2J$

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4 years ago

What is the best insulator?

Aleonysh [2.5K]

Answer:

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Explanation:

All others conduct electricity and heat.

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