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umka21 [38]
3 years ago
12

PLEASE HELP ME!!!!!!!!!!!!!

Physics
1 answer:
Nataly [62]3 years ago
6 0

Answer:

D gravity

Explanation:

please mark me brainliest

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A 350-N child is in a swing that is attached to a pair of ropes 2.10 m long. Find the gravitational potential energy of the chil
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Answer:

a)  U = 735 J , b) U = 125.7 J , c)   U = 0 J

Explanation:

The gravitational power energy is

      U = mg y - mg y₀

The last value is a constant, for simplicity we can make it zero, if the lowest point is at the origin of the coordinate system, which in this case we will place in the lowest part

a) Rope is horizontal

The height in this case is the same length of the rope

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b) when the angle is 34º

     y = L - L cos 34

    y = L (1- cos34)

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    y = 0.359 m

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c) in this case this point coincides with the reference system

     y = 0

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Julie is cycling at a speed of 3.4 meters/second. If the combined mass of the bicycle and Julie is 30 kilograms, what is the kin
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Velocity=3.4m/sec
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