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Hunter-Best [27]
1 year ago
11

Which option best describes the average acceleration from 40 to 70 s?

Physics
1 answer:
MAVERICK [17]1 year ago
8 0

C. The average acceleration is positive and smaller in magnitude than the initial acceleration.

<h3>What is average velocity?</h3>

Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.

a = Δv/Δt

where;

  • Δv is change in velocity
  • Δt is change in time

a = (250 - 248) / (70 - 40)

a = 0.067 m/s²

Thus, we can conclude that the average acceleration is positive and smaller in magnitude than the initial acceleration.

Learn more about average acceleration here: brainly.com/question/17587670

#SPJ1

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You will use the height of the bridge from the ground.

Solution:

Formula to be used is y=Viy(t)+g(t^2)/2

Where:

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Gravitational acceleration or g =9.8m/s^2

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Substitute all the given to the formula

10m=(0m/s)(t)+(9.8m/s^2)(t^2)/2

10mx2=9.8m/s^2(t^2)

Now isolate the variable you want to find which is T or time

10mx2/9.8m/s^2=t^2

20m/9.8m/s^2=t^2

Square root of 2.04= square root of t^2

T=1.43 secs

The answer is 1.43 seconds

8 0
3 years ago
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A man has a power of 90 W and mass 60 kg runs up a staircase in 40 s. If each staircase is 20cm high find the number of steps? (
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I showed my working in the images above. if you have any questions please feel free to ask

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3 years ago
Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several ob
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Answer:

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Explanation:

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Thus, the correction for this question is "D"

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

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