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Nataly_w [17]
3 years ago
9

Mary finishes a marathon at a speed of 2 m/s. If her

Physics
1 answer:
Snezhnost [94]3 years ago
5 0

Explanation:

v2 = v1 + at

v2 final speed

v1 initial speed

a acceleration

t time

2 = 0 + 4 a

a = 1/2

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If you are traveling around a curve at a constant speed will your velocity change?
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The force pressing two stacked objects together is equal to the weight of the object on top. The friction between a piece of woo
34kurt

Answer: B. Concrete

Explanation:

Let N = reacting force pressing the bodies in context together (units in Newtons),

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We need to start by finding the weight of the piece of wood.

friction is given by

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and from the chart reference the coefficient of friction between wood and stone, μ is 0.30.

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Divide both sides by 0.30 to find the value of N:

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To determine the new surface, you should find the new coefficient of friction by using the new value of the force of friction given 46.5:

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The refer chart also indicates that the coefficient of friction equals 0.62 between wood and concrete, so the new surface corresponding to 0.62 is the concrete, which is (B).

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What area of science compares and describes quantities and movements of matter and energy?
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Answer:

the answer is physics

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