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jasenka [17]
2 years ago
10

Pilings are driven into the ground at a building site by dropping a 2250 kg object onto them. What change in gravitational poten

tial energy does the object undergo if it is released from rest 16.0 m above the ground and ends up 1.30 m above the ground ? Change in gravitational potential energy:
Physics
1 answer:
den301095 [7]2 years ago
5 0

Answer: 324.135 kJ

Explanation:

Given

Mass of dropping is m=2250\ kg

The initial height of dropping is h_1=16\ m

The final height of dropping h_2=1.3\ m

Gravitational potential energy is the function of height i.e.

\Rightarrow \text{G.E.}=mgh

Change in Gravitational Energy is

\Rightarrow \Delta \text{G.E.}=mg(h_1-h_2)=2250\times 9.8\times (16-1.3)\\\\\Rightarrow \Delta \text{G.E.}=3,24,135\ J\approx 324.135\ kJ

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Answer:

h = 22.35 m

Explanation:

given,

initial speed of the rock,u = 0 m/s

length of the window,l = 2.7 m

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Speed of the rock when it crosses the window

v = \dfrac{l}{t}

v = \dfrac{2.7}{0.129}

  v = 20.93 m/s

height of the building above the window

using equation of motion

v² = u² + 2 g h

20.93² = 0² + 2 x 9.8 x h

h = 22.35 m

Hence, the height of the building above the top of window is equal to h = 22.35 m

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2 years ago
obesity occurs due to (a) overeating of carbohydrates and fats(b) not eating enough carbohydrates and fats (c) overeating of vit
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Answer:

B for BIG

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3 years ago
Using the picture above, which ball has the greatest potential energy?
weqwewe [10]
Ball 4 because the higher the elevation is the greater the potential energy it has
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Nuclear waste disposal is one of the largest issues with nuclear power. Cesium-137 is one of the high level waste products in an
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You can get these other numbers similarly:

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What effect does a tripling of the net force have upon the acceleration of the object?
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