2 years ago

Where on a roller coaster is centripetal forces at work.

1 answer:

5 0

Regardless of where the cars are in the loop, centripetal force is always directed toward the center of rotation. So even if a car you're riding in is at the top of a loop, upside-down, you will feel pressed into your seat.

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A thin, 100 g disk with a diameter of 8.0 cm rotates about an axis through its center with 0.15 J of kinetic energy. What is the

butalik [34]

Answer:

v=2.45 m/s

Explanation:

The rotational kinetic energy is calculated with:

$K=\frac{I\omega^2}{2}$

The moment of inertia of a disk is:

$I=\frac{mr^2}{2}$

A point on the rim of a disk will have a speed of:

$v=r\omega$

Putting all together:

$v=r\sqrt{\frac{2K}{I}}=r\sqrt{\frac{2(2K)}{mr^2}}=2\sqrt{\frac{K}{m}}$

Which for our values is:

$v=2\sqrt{\frac{0.15J}{0.1Kg}}=2.45m/s$

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4 years ago

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An example of inertia is when your body flies forward when you slam on the breaks.

Lostsunrise [7]

Answer:

A True ( I Think Its True I'm Not Intirely sure)

Explanation:

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2 years ago

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Which of these surfaces would have the least amount of friction?

lozanna [386]

Answer:

D. Satin Cloth

Explanation:

i thought it said glass, not grass lol

satin it the smoothest surface and therefore the least amount of friction.

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3 years ago

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What happens when white light shines through a translucent, red, glass window? a) All colors of light except red are transmitted

GREYUIT [131]

Answer:

b. Red light is transmitted through and reflected by the glass

Explanation:

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3 years ago

Please help me!!!

dezoksy [38]

<h2><em>The Answer to Youre Question:</em></h2>

<em>I think it is B.</em>

<em>I hope this helps.</em>

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3 years ago