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iogann1982 [59]
3 years ago
9

If a 10 kg object has 200 J of gravitational potential energy, how high was has it been lifted above the ground?

Physics
1 answer:
Fantom [35]3 years ago
6 0
Potential energy is possessed by the body while at rest while the body in motion possesses kinetic energy.
Potential energy is given by mgh where m is the mass of the body, g is the gravitational acceleration(9.8m/s^2) and h is the height.
Therefore, 200J = 10  × 9.8 ×h
                        h = 200/98
                        h = 2.041 m
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The components of vector A are:
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here as it is given that x component of the vector is positive while y component of the vector is negative so we can say the vector must inclined in Fourth quadrant.

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Now in order to find the value we can say that

tan\theta = \frac{opposite\: side}{adjacent\: side}

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3 years ago
A scuba diver is sitting on a boat while waiting to go on a dive and sees light reflected from the water's surface. At what angl
LUCKY_DIMON [66]

Answer:

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The angle to normal (vertcal) is

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Where θ₂ is the angle of the transmitted ray θ_p is the angle of the reflected polarized ray

We replace

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In the law of reflection  incident angle equals reflected angle,  

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Now we can calculate it

The refractive index of air is 1 (n1 = 1) the refractive index of seawater varies between 1.33 and 1.40 depending on the amount of salts dissolved in the water

n₂ = 1.33

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n₂ = 1.40

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      Tep = 54.5º

4 0
3 years ago
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