Betty weighs 449 N and she is sitting on a playground swing seat that hangs 0.3 m above the ground. Tom pulls the swing back and releases it when the seat is 0.77 m above the ground. The acceleration of gravity is 9.8 m/s 2 . How fast is Betty moving when the swing passes through its lowest position
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Betty weighs 449 N and she is sitting on a playground swing seat that hangs 0.3 m above the ground....
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