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Mamont248 [21]
3 years ago
9

What’s the kinetic energy of the roller coaster at the top and bottom of the hill? Use .

Physics
2 answers:
yulyashka [42]3 years ago
6 0

Answer:

A kiddie roller coaster car has a mass 100 kilograms. At the top of a hill, it’s moving at a speed of 3 meters/second. After reaching the bottom of the hill, its speed doubles. The car’s kinetic energy at the bottom is <em><u>quadruple</u></em> its kinetic energy at the top. The car has <u><em>1,800</em></u> joules of kinetic energy at the bottom of the hill.

Explanation:

I just took a Post Test on Edmentum over Energy :)

Good Luck!! :D

Black_prince [1.1K]3 years ago
3 0

Answer:

The car’s kinetic energy at the bottom is 4 times its kinetic energy at the top. The car has 1800 joules of kinetic energy at the bottom of the hill.

Explanation:

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P\propto \frac{1}{V}

Thus, the expression for final pressure in the two containers will be:

PV=P_1V_1+P_2V_2

P=\frac{P_1V_1+P_2V_2}{V}

where,

P_1 = pressure of N₂ gas = 4.45 atm

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Now put all the given values in the above equation, we get:

P=\frac{(4.45atm)\times (3.00L)+(2.75atm)\times (2.00L)}{7.2L}

P=2.62atm

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