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In fast pitch softball, many pitchers throw with a circular motion by spinning her arm in a vertical circle. If the person's arm is 0.75 cm long and the ball is released at 20 m/s, then what is the centripetal acceleration of the ball while it is in the pitcher's hand?
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A toy helicopter is traveling in a circle at a speed of 10 m/s and it takes 8.0 seconds to travel half way around. What is the radius of the circle?
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A local play ground has a small merry-go-round with a diameter of 2 m. a child located at the edge feels a centripetal acceleration of 1 g, the what is the child's velocity?
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At the summer olympics, a springboard diver spins around once every 0.15 seconds. His head is located 55cm from the axis of rotation. If his brain has a mass of 1.5 kg, then cacluate the centriptal force experienced by his brain.