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3 years ago

A crate of 890 kg gets raised to a height of 2.1m. Calculate the crate's gravitational potential energy.

Physics

2 answers:

Licemer1 [7]3 years ago

8 0

Gravitational potential energy = mass x height x gravity

So you would do 890 x 2.1 x gravity (which is 9.8 on earth)

mars1129 [50]3 years ago

4 0

Answer:

18,316.2

Explanation:

The formula for GPE is mgh, where

M = Mass of the object

G = Acceleration due to gravity (9.8 m/s^2 on Earth)

H = Height above ground

890 × 9.8 × 2.1 = 18,316.2

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Water from a fire hose is directed horizontally against at a rate of 50.0 kg/s and a speed of 42.0 m/s.

ss7ja [257]

Answer:

Force, |F| = 2100 N

Explanation:

It is given that,

Water from a fire hose is directed horizontally against at a rate of 50.0 kg/s, $\dfrac{m}{t}=50\ kg/s$

Initial speed, v = 42 m/s

The momentum is reduced to zero, final speed, v = 0

The relation between the force and the momentum is given by :

$F=\dfrac{p}{t}$

$F=\dfrac{mv}{t}$

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3 years ago

Find the speed of light in each of the following materials. (a) gallium phosphide m/s (b) carbon disulfide m/s (c) benzene

Oksanka [162]

Explanation:

We need to calculate the speed of light in each materials

(I). Gallium phosphide,

The index of refraction of Gallium phosphide is 3.50

Using formula of speed of light

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$v=\dfrac{3\times10^{8}}{3.50}$

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(II) Carbon disulfide,

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Put the value in the equation (I)

$v=\dfrac{3\times10^{8}}{1.63}$

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The index of refraction of Gallium phosphide is 1.50

Put the value in the equation (I)

$v=\dfrac{3\times10^{8}}{1.50}$

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3 years ago

A crate of 890 kg gets raised to a height of 2.1m. Calculate the crate's gravitational potential energy.​

A crate of 890 kg gets raised to a height of 2.1m. Calculate the crate's gravitational potential energy.