2 years ago

I need help on this science

Physics

1 answer:

Serga [27]2 years ago

8 0

Ok ok ok ok ok ok ok ok ok

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A roller coaster moves 200 ft horizontally, then rises 135 ft at an angle of 30.0Â° above the horizontal. Next, it travels 135 f

vekshin1

Answer:

171 ft

Explanation:

The distance to be calculated is AB

AB = AC + BC

AC; Cos 60 = AC ÷ 135

AC = 135 cos 60 = 67.5 ft

BC; Cos 40 = BC ÷ 135

BC = 135 cos 40 = 103.416 ft

AB = 67.5 + 103.416 = 170.9159998210 ft

Distance between starting point to end point = 171 ft

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2 years ago

Once broken into parts curved motion can be worked as ________________ problems along both axes.

vovikov84 [41]

Answer:

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Explanation:

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3 years ago

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3 years ago

If the displacement of a horizontal mass-spring system was doubled, the elastic potential energy in the system would change by a

bixtya [17]

Answer:

K'=4K

Explanation:

The electric potential energy is given by :

$E=\dfrac{1}{2}kx^2$

Where

k is spring constant

x is compression or extension in the spring

If the displacement of a horizontal mass-spring system is doubled, x'= 2x

New elastic potential energy :

$E'=\dfrac{1}{2}kx'^2\\\\E'=\dfrac{1}{2}k(2x)^2\\\\=\dfrac{1}{2}k\times 4x^2\\\\K'=4\times \dfrac{1}{2}kx^2\\\\K'=4K$

So, new elastic potential energy 4 times the initial elastic potential energy.

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Explanation:

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Hope this helps!!

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2 years ago