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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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We know that -

$P.E=m*g*h$

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$h=height$

First we convert height into meters.

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3 years ago

A 2000-kg railway freight car coasts at 4.4 m/s underneath a grain terminal, which dumps grain directly down into the freight ca

ruslelena [56]

Answer:

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2 years ago

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Solution :

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$d=\frac{n \lambda D}{\Delta y}$

$=\frac{2 \times 50 \times 10^{-9} \times 3}{2 \times 8.24 \times 10^{-3}}$

= 0.000018203 m

= 0.0182 mm

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The intensity of light is given by :

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$I=I_0\left(\frac{\sin \frac{\pi d \sin \theta}{\lambda}}{\frac{\pi d \sin \theta}{\lambda}}\right)^2$

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2 years ago