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pogonyaev
3 years ago
14

A force F acts at one corner of a thin, square metal plate. The force acts in the same plane as the plate. Which dashed line rep

resents the lever arm for the force about point O at the center of the plate
Physics
1 answer:
Delvig [45]3 years ago
6 0

The image of the thin square metal plate showing the force and the lines are missing, so i have attached it.

Answer:

Line B represents the lever arm

Explanation:

From the attached image, we can see 4 different dashed lines between the force F and the moment centroid O.

Now, we want to know which of the dashed lines represents lever arm.

Now, in physics/engineering, the lever arm which is also known as moment arm is defined as the perpendicular distance between the line of action of the acting force and the centre of the moments.

Now, from the image attached, the only dashed line that is perpendicular to the acting Force F and the moment centre O is Line B.

Thus,line B represents the lever arm

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To solve this problem it is necessary to apply the concepts given in the kinematic equations of movement description.

From the perspective of angular movement, we find the relationship with the tangential movement of velocity through

\omega = \frac{v}{R}

Where,

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v = Lineal Velocity

R = Radius

At the same time we know that the acceleration is given as the change of speed in a fraction of the time, that is

\alpha = \frac{\omega}{t}

Where

\alpha =Angular acceleration

\omega = Angular velocity

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Our values are

v = 60\frac{km}{h} (\frac{1h}{3600s})(\frac{1000m}{1km})

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\omega = \frac{v}{R}

\omega = \frac{ 16.67}{0.25}

\omega = 66.67rad/s

Therefore the angular speed of a point on the outer edge of the tires is 66.67rad/s

At the same time the angular acceleration would be

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\alpha = \frac{66.67}{6}

\alpha = 11.11rad/s^2

Therefore the angular acceleration of a point on the outer edge of the tires is 11.11rad/s^2

5 0
3 years ago
Which is the correct scientific notation of the number 0.000681?
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Answer:

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Explanation:

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Answer:

hello your question is not properly arranged attached below is the arranged table and solution

answer : attached table below

Explanation:

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