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gayaneshka [121]
2 years ago
7

A ball is thrown vertically upward and then comes back down. During the ball's flight up and down, its velocity and acceleration

vectors are?
Physics
1 answer:
Dovator [93]2 years ago
6 0

During the ball's flight up its velocity and acceleration vectors are in opposite direction and during the ball's flight down its velocity and acceleration vectors are in same direction.

  • The velocity vector is always in the direction of motion of the object. So, during the ball's flight up its velocity vector is in the upward direction (90°) and during the ball's flight down its velocity vector is in the downward direction (270°).
  • When there is a positive acceleration in the object the acceleration vector is in the direction of motion of the object. When there is a negative acceleration in the object the acceleration vector is in the opposite direction of motion of the object. So, during the ball's flight up its acceleration vector is in the downward direction (270°) and during the ball's flight down its acceleration vector is in the upward direction (90°).

Velocity vector is the rate of change of position of an object. Acceleration vector is the rate of change of velocity of an object.

Therefore, during the ball's flight up its velocity and acceleration vectors are in opposite direction and during the ball's flight down its velocity and acceleration vectors are in same direction.

To know more about velocity and acceleration vectors

brainly.com/question/13492374

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Answer:

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If a material has a high thermal conductivity, is it a<br> conductor or an insulator?
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(a) 4.74\cdot 10^14 Hz

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f=\frac{c}{\lambda}

where

c=3.0\cdot 10^8 m/s is the speed of the wave in a vacuum (speed of light)

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In this problem, we have laser light with wavelength

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f=\frac{3.0\cdot 10^8 m/s}{6.33\cdot 10^{-7} m}=4.74\cdot 10^14 Hz

(b) 427.6 nm

The wavelength of an electromagnetic wave in a medium is given by:

\lambda=\frac{\lambda_0}{n}

where

\lambda_0 is the original wavelength in a vacuum (approximately equal to that in air)

n is the index of refraction of the medium

In this problem, we have

\lambda_0=632.8 nm

n = 1.48 (index of refraction of glass)

Substituting into the formula,

\lambda=\frac{632.8 nm}{1.48}=427.6 nm

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v=\frac{c}{n}

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Since in this problem n=1.48, we find

v=\frac{3\cdot 10^8 m/s}{1.48}=2.03\cdot 10^8 m/s

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