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Alecsey [184]
3 years ago
8

A 200 kg roller coaster car is located at the top of a hill where the height is 30 m. What is the velocity when it reaches the b

ottom of the hill?
Chemistry
2 answers:
Alex_Xolod [135]3 years ago
4 0

Answer:

d- 24.2 m/s

Explanation:

i just answered on edge

kenny6666 [7]3 years ago
3 0
Assuming there is not loss of energy due to frinction (which is an idealization), you can use the conservation of energy law in the form:


Mechanical energy at top = mechanical energy at bottom.


Mechanical energy at top = potential energy = m * g * h


Mechanical energy at bottom = kinetic energy = m * v^2 / 2


=> m *v^2 / 2 = m * g * h

=> v^2 / 2 = g * h

=> v ^2 = 2gh

=> v = √(2gh) = √(2 * 9.8 m/s^2 *30m) = 24.25 m/s


Answer: 24.25 m/s
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