In an emergency you can start a car with a manual transmission by putting it in neutral, letting the car roll down a hill to pick up speed, then putting it into gear and quickly releasing the clutch. If the car needs to be moving at 3.5 m/s for this to work, how high a hill do you need? Ignore friction and drag.

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In an emergency you can start a car with a manual transmission by putting it in neutral, letting the car roll down a hill to pick up speed, then putting it into gear and quickly releasing the clutch. If the car needs to be moving at 3.5 m/s for this to work, how high a hill do you need? Ignore friction and drag.

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