Answers
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1.) At position #3, total energy
will be all in KE because there
is no height and no friction
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So…use E
T
=KE=1/2mv
2
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KE=1/2 x 0.5kg x (25m/s)
2
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So…KE=156.25J=PE (at
position#1)
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So…
Δ
PE=156.25J=mg
Δ
h
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And
Δ
h=31.86m