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Tresset [83]
2 years ago
13

There is a 2kg ball resting on the roof of a house that is 8m high. What is the balls gravitational potential energy? GPE- mgh.

G-9.8 m/s^2
Physics
1 answer:
miskamm [114]2 years ago
6 0

Answer:

<h2>156.8 J</h2>

Explanation:

The gravitational potential energy of a body can be found by using the formula

GPE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

From the question we have

GPE = 2 × 9.8 × 8 = 156.8

We have the final answer as

<h3>156.8 J</h3>

Hope this helps you

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The mechanical energy is lost due to friction between the two peak is 78,458.688 J

<h3>What is mechanical energy?</h3>

The mechanical energy is the sum of kinetic energy and the potential energy of an object at any instant of time.

M.E = KE +PE

Given is a roller coaster ride the total mass of a cart - with two passengers included - is 319 kg. Peak K is at 43.6 m above the ground and peak L is at 24.4 m. At location K the speed of the cart is 16.4 m/s, and at location L it is 12.4 m/s.

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Substitute the values, we get

TE₁ =  1/2 x319 x 16.4² +319 x 9.81 x 43.6

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Total energy at peak L,

TE₂ = 1/2 mv₂² +mgh₂

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TE₂ =  1/2 x319 x 12.4² +319 x 9.81 x 24.4

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M.E =  179,340. 524 J -  100,881. 836 J

M.E = 78,458.688 J

Thus, the mechanical energy is lost due to friction between the two peak i

Learn more about mechanical energy.

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