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erastovalidia [21]
3 years ago
15

What is the tangential velocity at the edge of a disk of radius 10cm when it spins with a frequency of 10Hz? Give your answer wi

thout a unit, in cm⋅s−1, and correct to two significant figures
Physics
1 answer:
Nina [5.8K]3 years ago
8 0

Answer:

630cm/s

Explanation:

In simple harmonic motion, the tangential velocity is expressed mathematically as v = ὦr

ὦ is the angular velocity = 2πf

r is the radius of the disk

f is the frequency

Given the radius of disk = 10cm

frequency = 10Hz

v = 2πfr

v = 2π×10×10

v = 200π

v = 628.32 cm/s

The tangential velocity = 630cm/s ( to 2 significant figures)

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Explanation:

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A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force. Let us take it that the force act
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Answer:

cos 0 = 1.

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3 years ago
Which best describes why scientific models change over time?
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Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

Below are the choices and the answer is <span>B. 
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Review. A light spring of force constant 3.85 N/m is compressed by 8.00 cm and held between a 0.250-kg block on the left and a 0
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The answer is 0.245N.

<h3>What is kinetic energy?</h3>
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(b) 0.100

For the block on the left, f_{k} =u_{k} n= 0.100(2.45N)=0.245N.

∑F_{x}=ma_{x}

–0.308N+0.245N=(0.250kg)a

a=−0.252m/s^{2} if the force of static friction is not too large.

For the block on the right, f_{k} =u_{k} n=0.490N. The maximum force of static friction would be larger, so no motion would begin, and the acceleration is zero

To learn more about kinetic energy, refer to:

brainly.com/question/25959744

#SPJ4

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<span> is located between the fulcrum and the resistance force -direction of force does

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