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anyanavicka [17]
3 years ago
8

Determine the kinetic energy of a 100-kg roller coaster car that is moving with a speed of 20.0/ms.

Mathematics
1 answer:
rjkz [21]3 years ago
3 0

Answer:

The kinetic energy is 20,000\ J

Step-by-step explanation:

The kinetic energy of a body is defined as:

k = \frac{1}{2}ms ^ 2

Where <em>m</em> is the mass of the roller coaster car

<em>s</em> is the speed and <em>k</em> is the kinetic energy

We know that s = 20\ m/s

m = 100\ kg

Then the kinetic energy of the roller coaster car is:

k = \frac{1}{2}(100)(20) ^ 2\\\\k = 50(20) ^ 2\\\\k = 50 * 400\\\\k = 20,000\ J

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Multiply the price of the tv by 80% to find the sale price:

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