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kogti [31]
2 years ago
8

Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic energy is the energy of motion, and

potential energy is stored energy.
Raise the pendulum again. Carefully watch the Energy Graph on the left. It shows the amount of energy the pendulum has as it moves.

At the top of its swing, does the pendulum have kinetic energy or potential energy?
PLEASE HELP!
Physics
1 answer:
mihalych1998 [28]2 years ago
7 0

Answer:

Potential energy only

Explanation:

at the top of its swing the pendulum stops moving , (therefore it has no KINETIC energy)  thus all of the energy is stored as potential energy.

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Answer:

  • <u>77.8 m/s, downward</u>

Explanation:

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Also, by definition, the average speed is the distance divided by the time:

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Then:

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Other kinematic equation for uniform acceleration is:

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Replacing the known values we can set a system of two equations:

From (Vf + Vi)/2 = 300m/6.62s

(Vf + Vi) = 2 × 300m/6.62s

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From Vf = Vi + a×t

Vf - Vi = 9.8 (6.62)

  • Vf - Vi = 64.876     equation 2

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  • 2Vf = 155.510

  • Vf = 77.8 m/s downward (velocities must be reported with their directions)
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