3 years ago

What is potential energy of a 10.0 kg weight suspended 3.0m above the ground?

Physics

1 answer:

Aloiza [94]3 years ago

6 0

Answer:

300 J

Explanation:

The potential energy E of an object with mass m kg,residing h meters above the ground level can be given as, E = mgh

Where g = gravitational acceleration

we can calculate,

E =10×10×3 = 300 J

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2 years ago

A uniform-density 7 kg disk of radius 0.21 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is

GREYUIT [131]

Answer:

$\omega = 22.67 rad/s$

Explanation:

Here we can use energy conservation

As per energy conservation conditions we know that work done by external source is converted into kinetic energy of the disc

Now we have

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now we know that work done is product of force and displacement

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now for moment of inertia of the disc we will have

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now from above equation we will have

$39.6 = \frac{1}{2}(0.154)\omega^2$

$\omega = 22.67 rad/s$

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2 years ago

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Answer:

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