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boyakko [2]
4 years ago
14

A girl goes for a walk. Her motion is recorded on the coordinate plane below. On the plane, each block represents 1 km.

Physics
2 answers:
natali 33 [55]4 years ago
4 0

a) Displacement is a distance between the start and the finish: 4

b) Distance: total length: 2+4+2=8

IgorLugansk [536]4 years ago
3 0

Explanation:

A girl goes for a walk. Her motion is recorded on the coordinate plane below. On the plane, each block represents 1 km.

(a) We need to find the displacement of the girl. The displacement of a particle is equal to the shortest path covered by her. In the given graph, the initial position of the particle is A and finally it comes to point B. So, the displacement of the girl is 4 km.

(b) The distance walked by the girl is equal to the total path covered by her during her entire motion. So, the distance walked by the girl is 2 km + 4 km + 2 km = 8 km.

Hence, this is the required solution.

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Two white rabbits produce a brown rabbit. How is this possible? Explain
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Answer:

If one of the parents is white and the other is brown, their offspring will be either white or brown with equal probabilities. Rabbits in this population mate randomly; thus, the probability of mating two white rabbits is the same as the probability of mating between two brown rabbits.

Explanation:

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3 years ago
g ) (62.44 pts.) Explain why a maximum or a minimum of occurs exactly when an inflection point occurs for
Ivan

Answer:

we approach a maximum or minimum the values ​​of the ordinate are closer and closer and when passing this point the values ​​change their trend

Explanation:

The reason for this process occurs because as we approach a maximum or minimum the values ​​of the ordinate are closer and closer and when passing this point the values ​​change their trend if they were rising, they begin to fall and if they were falling they begin to rise. Therefore the maximum point is a point of inflection of the curve since its trend changes.

Another way of looking at this process is that mathematically the point where there is a maximum or a minimum corresponds to the point where the first derivative is equal to zero, this is the slope of the line is horizontal, so the points before after correspond to values ​​with slope of different sign.

4 0
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Determine whether each phrase describes speed or velocity. The displacement of an object during a specific unit of time: How fas
svet-max [94.6K]

<em>The displacement of an object during a specific unit of time:  </em>Velocity (the direction is part of displacement.)

<em>How fast or slow an object is moving and in what direction: </em>Velocity (speed & direction)

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8 0
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A heavy flywheel rotating on its central axis is slowing down because of friction in its bearings. At the end of the first minut
Soloha48 [4]

Answer:

ω₂ = 93.6 rev / min

Explanation:

ω₀ = 260 rev / min

ω₁ = 0.68*ω₀ = 0.68*(260 rev / min) = 176.8 rev / min

ω₂ = ?

t₁ = 1 min

t₂ = 2 min

We can apply the equation:

ω₁ = ω₀ + α*t₁     ⇒    α = (ω₁ - ω₀) / t₁  

⇒   α = (176.8 rev / min - 260 rev / min) / 1 min = - 83.2 rev / min²

then we can use the same formula, knowing the angular acceleration:

ω₂ = ω₀ + α*t₂   ⇒   ω₂ = (260 rev / min) + (- 83.2 rev / min²)*(2 min)

⇒   ω₂ = 93.6 rev / min

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4 years ago
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