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Paraphin [41]
3 years ago
9

LOOK AT THE PICTURE!! 3 Please answer properly

Physics
2 answers:
Bogdan [553]3 years ago
8 0
Highest point  ( A ) ...

Not moving       ==> zero kinetic energy
Highest altitude ==> maximum potential energy
                               ------------------------------------       
Total energy      ==> all potential


Halfway up, halfway down  ( B ) ...

Half-altitude  ==>  half of total energy is potential 
Moving         ==>  some kinetic energy; must be half of total
                          -----------------------------------------
Total energy  ==>  same total; half potential, half kinetic


Lowest point  ( C ) ...

Minimum altitude  ==>  zero potential energy 
Fastest speed      ==>  maximum kinetic energy
                          -----------------------------------------
Total energy         ==>  same total; no potential, all kinetic
babunello [35]3 years ago
4 0
The total energy at A, B and C is constant and does not change.

At A, all the energy is potential energy. It gets converted partially to kinetic energy at B and is completely converted to kinetic energy at C. At C, all the energy is kinetic energy.
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a crane lifts a 35000 N steel girder a distance of 25 m in 45 s. How much power did the crane require to lift the girder
Angelina_Jolie [31]
Hello.

The formula for Power is Work divided by Time; however, we do not have our value for Work - yet.
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Let's multiply our Force by our Distance. Remember that our Force is always  measured in Newtons (N), and our Distance is measured by Meters (M).
35,000 * 25 = 875,000 J (Unit for Work is "J" or "Joules")

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3 years ago
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