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Dahasolnce [82]

2 years ago

12

A roller coaster is traveling at 13 m/s when it approaches a hill that is 400 m long. Heading down the hill, it accelerates at 4

.0 m/s2. What is the final velocity of the roller coaster? Round your answer to the nearest whole number.
m/s

1 answer:

Vera_Pavlovna [14]2 years ago

8 0

Answer:

2as = v² - u²

v = √(2as + u²)

v = √(2 x 4 x 400 + 13²)

v = 58 m/s

Explanation:

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0.36 J of work is done in stretching the spring from 15 cm to 18 cm.

To find the correct answer, we need to know about the work done to strech a string.

<h3>What is the work required to strech a string?</h3>

Mathematically, the work done to strech a string is given as 1/2 ×K×x².
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The force experienced by a streched spring is given as Kx. x is the length of the spring streched from its natural length.
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Work done = 1/2×k×x²
Here x= 18-15=3cm or 0.03 m
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A perfectly flexible cable has length L, and initially it is at rest with a length Xo of it hanging over the table edge. Neglect

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Explanation:

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