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physics

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a squirt gun is tied to a string and released when it is 1 meter above the ground. the mass of the gun is .1kg. what ist its initial PE? 1Joule
what is its PE when it has fallen to .75meters? .75 J
What is its KE at this point? .25 J
What is its velocity? 0 m/s

Above is the correct answer I solved, but help me using the above information, to these questions.

what is its PE when it has ffallen to 0.5 m ?
what is its KE at his point?
What is its velocity?

what is its PE when it has fallen to 0.25m?
what is its KE at this point?
what is its velocity?
and what is its velocity right before it hits the ground?

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