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3 years ago

14

Can someone explain the law of conservation of energy?

1 answer:

julsineya [31]3 years ago

5 0

The law of conservation of energy is a law that states that "energy cannot be created or destroyed, only changed" this means that you can't create it or destroyed as in, if you burn wood, you have released the energy. you haven't destroyed it, you have just released it

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horsena [70]

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2 years ago

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A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the window is 7.5 m off the ground. T

slamgirl [31]

Answer:

$u=14.48m/s$

Explanation:

From the question we are told that:

Height of window $h=2m$

Height of window off the ground $h_g=7.5m$

Time to fall and drop $t=1.3s$

Generally the Newton's equation motion is mathematically given by

$s=ut+\frac{1}{2}at^2$

Where

$h=ut+\frac{1}{2}at^2$

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Generally the Newton's equation motion is mathematically given by

$2as=v^2-u^2$

Where

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$u=\sqrt{209.5681}$

$u=14.48m/s$

Therefore the ball’s initial speed

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