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alekssr [168]
2 years ago
7

A car speeds up from 3 m/s to 10 m/s in 8 s. How far does the car travel while doing this? 2. A

Physics
1 answer:
yarga [219]2 years ago
5 0

Initial velocity=u=3m/s

Final velocity=v=10m/s

Time=t=8s

\boxed{\sf Acceleration=\dfrac{v-u}{t}}

\\ \sf\longmapsto Acceleration=\dfrac{10-3}{8}

\\ \sf\longmapsto Acceleration=\dfrac{7}{8}

\\ \sf\longmapsto Acceleration=0.8m/s^2

  • Distance =s

Using second equation of motion

\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2

\\ \sf\longmapsto s=3(8)+\dfrac{1}{2}(0.8)(8)^2

\\ \sf\longmapsto s=24+0.4(64)

\\ \sf\longmapsto s=24+25.6

\\ \sf\longmapsto s=49.6m

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Explanation:

Newton's third law of motion states that:

<em>"When an object A exerts a force on object B (action force), then action B exerts an equal and  opposite force (reaction force) on object A"</em>

It is important to note from the statement above that the action force and the reaction force always act on different objects. Let's take an example: a man pushing a box. We have:

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As we can see from this example, the action force is applied on the box, while the reaction force is applied on the man: this means that the two forces do not act on the same object. This implies that whenever we draw the free-body diagram of the forces acting on an object, the action and reaction forces never appear in the same diagram, since they act on different objects.

Learn more about Newton's third law of motion:

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3 years ago
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Brilliant_brown [7]

Answer:

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3 years ago
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34kurt
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To answer this question, let's write Newton's second law of the two axes

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   The direction of this force is along the length of the rods that are in an Angle, where the x and y components of the force come from

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