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Initial State: Ball at rest at top of ramp.
Final State: Ball in motion at bottom of the ramp.
Notes: The system includes the ball and earth. Resistance forces are negligible.

Initial State: Ball at rest at top of ramp. Final State: Ball in motion at bottom of the ramp. Notes: The system includes the ball and earth. Resistance forces class=

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Initial: bring ek, eg and ech all to 2, in the end bring ek, eg up to 3 each

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