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Anit [1.1K]
2 years ago
9

Which statement is TRUE?

Physics
1 answer:
Georgia [21]2 years ago
4 0
The answer is B I know this because I’m Asian
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What is it when you divide the total distance traveled by the total time
alexdok [17]

This is called average speed.Its really simple

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3 years ago
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What is the magnitude of the total acceleration of point A after 2 seconds? The bar starts from rest and has a constant angular
monitta

Answer:

a_total = 2 √ (α² + w⁴) ,   a_total = 2,236 m

Explanation:

The total acceleration of a body, if we use the Pythagorean theorem is

          a_total² = a_T²2 + a_{c}²

where

the centripetal acceleration is

  a_{c} = v² / r = w r²

tangential acceleration

   a_T = dv / dt

angular and linear acceleration are related

         a_T = α  r

we substitute in the first equation

       a_total = √ [(α r)² + (w r² )²]

       a_total = 2 √ (α² + w⁴)

Let's find the angular velocity for t = 2 s if we start from rest wo = 0

        w = w₀ + α t

        w = 0 + 1.0 2

        w = 2.0rad / s

       

we substitute

        a_total = r √(1² + 2²) = r √5

        a_total = r 2,236

In order to finish the calculation we need the radius to point A, suppose that this point is at a distance of r = 1 m

         a_total = 2,236 m

7 0
3 years ago
A little girl is swinging on her tire swing. At the lowest point of her swing, the tension in the rope is a) Equal to the gravit
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A because the girl in that instant is not moving up or down so
( up forces)=(down forces )
The up forces is the tension of the rope and down forces us mg -the gravitational force on the girl by the earth
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3 years ago
What is the purpose of a rearview mirror in a car?
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The third choice.

The driver wants to see the object that is behind him. The light reflects off the mirror into the eyes of the driver portraying the object behind him
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2 years ago
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What is nucleic acid
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like dioxyribonucleic acid? if so then that's DNA


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