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kobusy [5.1K]
3 years ago
10

[someone help] The speed of the object 7 seconds after it is dropped is ___m/sec

Mathematics
1 answer:
nadezda [96]3 years ago
3 0

9514 1404 393

Answer:

  68.6 m/s

Step-by-step explanation:

The speed at a given time is the derivative of the height at that time.

  dh/dt = -9.8t

At t=7, the speed is ...

  -9.8(7) = -68.6 . . . . . meters per second (downward)

The speed is 68.6 meters per second.

_____

<em>Additional comment</em>

Height is considered to be positive in the up direction, so velocity and acceleration are also positive in the up direction. The derivative of height will be the velocity. Its negative sign in this case indicates the object is moving in the downward direction. The speed is the magnitude (absolute value) of the velocity.

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Tyler made a scale drawing of a 24 ft long boat. In his drawing, the boat was 6 inches. The scale that Tyler used for his drawin
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Answer:

In Tyler scale, 1 inch equals 4 ft.

Step-by-step explanation:

Giving the following information:

Tyler made a scale drawing of a 24 ft longboat. In his drawing, the boat was 6 inches.

<u>We know that 1 ft is 12 inches. Therefore, 24 ft:</u>

24*12= 288 inches

<u>Now, we have to determine the scale that Tyler used.</u>

<u></u>

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1 Tyler inch= 48/12= 4 ft

In Tyler scale, 1 inch equals 4 ft.

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Answer:

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Step-by-step explanation:

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7 0
3 years ago
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What is -6 and -4? find the distance between each pair of integers on a number line.
Brilliant_brown [7]
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Solve the equation N/-2=-15
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Answer:

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Step-by-step explanation:

N/-2=-15

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Three people who work full-time are to work together on a project, but their total time on the project is to be equivalent to th
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Answer:

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Step-by-step explanation:

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The third person should budget 1/6 of their time to the project.

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