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polet [3.4K]
3 years ago
11

What is the answer to do when your car has no battery.

Physics
1 answer:
SCORPION-xisa [38]3 years ago
8 0
Usually, when a car battery is dead, the most common way to start it is to jump start it.

Hope this helps and hope you have a great day
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Hi everyone, I need help on the question: Why are humans the most dangerous creatures in the ocean
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3 years ago
A 25.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 21.00 m. When she is partway do
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Answer:

The mechanical energy lost due to friction is 2,424.5 J

Explanation:

Given;

mass of the child, m = 25 kg

intial velocity of the child, u = 0

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initial position of the child, h₁ = 21 m

final position of the child, h₂ = 8 m

Let the energy lost due to heat = ΔE

ΔE + ΔK.E  + ΔP.E = 0

ΔE  +   ¹/₂m(v² - u²)  +  mg(h₂ - h₁) = 0

ΔE   +   ¹/₂ x 25(7.8² - 0)    +   25 x 9.8(8 - 21) = 0

ΔE   +  760.5 J   - 3185 J =

ΔE   -  2,424.5 J = 0

ΔE = 2,424.5 J

Therefore, the mechanical energy lost due to friction is 2,424.5 J

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