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erik [133]
3 years ago
14

A pizza delivery person drives 3 miles North then 5 miles West and then 3 miles South to deliver a pizza. What is the person's d

isplacement?
A. 45 miles
B. 8 miles
C. 11 miles
D. 5 miles west
Physics
2 answers:
Anton [14]3 years ago
7 0

Answer: it’s 11

Explanation:

I just did the question

AleksAgata [21]3 years ago
4 0

Answer:11

Explanation:

Just did it

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Answer:

Velocity=14[m/s]

Explanation:

We can solve this problem by using the principle of energy conservation, where potential energy becomes kinetic energy.

In the attached image we can see the illustration of the ball falling from the height of 20 meters, at this time the potential energy will have the following value.

Ep=m*g*h\\where:\\m=3[kg]\\h=20[m]\\

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When the ball passes through half of the distance (10m) its potential energy will have decreased by half as shown below.

Ep=3*9.81*10\\Ep=294.3[m]

If we know that potential energy is transformed into kinetic energy, we can find the value of speed.

Ek=\frac{1}{2} *m*v^{2} \\therefore\\v=\sqrt{\frac{Ek*2}{m} } \\v=\sqrt{\frac{294.3*2}{3} } \\\\v=14[m/s]

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Mechanical energy is a term that is used to describe
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Answer is   B.  both potential and kinetic energy.

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