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uysha [10]
3 years ago
5

A plane has a mass of 2,000 kg and is traveling 100 meters above the ground. What is the plane’s potential energy?

Physics
1 answer:
evablogger [386]3 years ago
8 0

Answer: 1964000 Joules

Explanation:

PE = mgh

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Answer:

a) 29.36 m

b) 2.44 s

c) 2.57 s

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Explanation:

t = Time taken

u = Initial velocity = 24 m/s

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b)

v=u+at\\\Rightarrow 0=24-9.81\times t\\\Rightarrow \frac{-24}{-9.81}=t\\\Rightarrow t=2.44 \s

Time taken by the ball to reach the highest point is 2.44 seconds

a)

s=ut+\frac{1}{2}at^2\\\Rightarrow s=24\times 2.44+\frac{1}{2}\times -9.81\times 2.44^2\\\Rightarrow s=29.35\ m

The highest point reached by the ball above its release point is 29.36 m

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s=ut+\frac{1}{2}at^2\\\Rightarrow 32.35=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{32.35\times 2}{9.81}}\\\Rightarrow t=2.57\ s

The ball reaches the ground 2.57 seconds after reaching the highest point

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v=u+at\\\Rightarrow v=0+9.81\times 2.57\\\Rightarrow v=25.2117\ m/s

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Answer:

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Explanation:

We must remember that the power can be determined by the product of the current by the voltage.

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Now replacing:

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Now the energy consumed can be obtained mediate the multiplication of the power by the amount of time in operation, we must obtain an amount in Kw per hour [kW-min]

Energy = 931.7[kW]*30[days]*10[\frac{min}{1day} ]=279510[W*min]or 27.95[kW*min]

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