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Inga [223]
3 years ago
8

(a) How much gravitational potential energy (relative to the ground on which it is built) is stored in an Egyptian pyramid, give

n its mass is about 8 ✕ 109 kg and its center of mass is 34.0 m above the surrounding ground?.
Physics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer:

2.66832\times10^{12}

Or

2,668,320,000

Explanation:

Potential energy is given as the product of mass, acceleration due to gravity and height.

PE=mgh

Where m is the mass of pyramid, g is acceleration due to gravity and h is height at any point.

In reference to the earth, we substitute h for 34.0 m and g with 9.81 m/s2 then taking m as 8000000000 kg we get that

PE=mgh=8000000*9.81*34.0=2,668,320,000 J

In scientific notafion, this is expressed as 2.66832\times10^{12}

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Answer:

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At point 0, the ball is at height y₀.

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y₀ = 5 (2.25 + 3t₁ + t₁²)

y₀ = 11.25 + 15t₁ + 5t₁²

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30 = 11.25 + 15t₁

t₁ = 1.25

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30 = y₀ − 5(1.25)²

y₀ ≈ 37.8

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