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BlackZzzverrR [31]
3 years ago
12

Suppose we wrap a string around the surface of a uniform cylinder of radius 38.0 cm that is supported by an axle passing through

its center. This cylinder rotates without friction and we tie a mass to the end of the string and let it fall under the influence of gravity. As the weight falls, we measure the constant acceleration of the falling mass to be 9.0 m/s2. Find the angular acceleration that the cylinder will experience under these conditions. (Assume the positive direction is the initial direction of rotation of the cylinder. Indicate the direction with the sign of your answer.)
Physics
1 answer:
liraira [26]3 years ago
4 0

Answer:

Angular acceleration = 23.68 rad / s²

Explanation:

Given that,

acceleration = 9m/s²

Therefore acceleration of string is 9m/s²

since string is constant in length

cylinder of radius 38.0 cm = 0.38m

Angular acceleration = a / r

Angular acceleration = 9 / 0.38

                                   = 23.68 rad / s²

Angular acceleration = 23.68 rad / s²

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7 0
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The sound level of one person talking at a certain distance from you is 80 dB. If she is joined by 2 more friends, and all of th
Pepsi [2]

Answer:

Explanation:

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80 = 10 log I / 10⁻¹²

8 = log I / 10⁻¹²

I / 10⁻¹² = 10⁸

I = 10⁻⁴ W / m² .s

for three person the intensity becomes three times ie

3 x 10⁻⁴

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tankabanditka [31]
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A seesaw pivots as shown in below. What is the net torque about the pivot point?
rodikova [14]

Answer:

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Explanation:

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The net torque is 2.3 Nm clockwise.

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