A high diver of mass 60.0 kg jumps off a board 10.0 m above the water. If her downward motion is stopped 2.10 s after she enters the water, what average force did the water exert on her?
A high diver of mass 60.0 kg jumps off a board 10.0 m above the water. If her downward motion is stopped 2.10 s after she enters the water, what average force did the water exert on her?
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Transcribed Image Text:A high diver of mass 60.0 kg jumps off a board 10.0 m above the water. If her downward motion is stopped 2.10 s after
she enters the water, what average force did the water exert on her?
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An inventive child wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that
passes over a frictionless pulley, the child pulls on the loose end of the rope with such a force that the spring scale reads
350 N. The child's true weight is 300 N, and the chair weighs 160 N.
(a) Show that the acceleration of the child-chair system is upward and find its magnitude.
m/s²
(b) Find the force the child exerts on the seat of the chair.
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