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OpenStudy (anonymous):
A playground is surrounded by a fence 2.0 m high. A boy who plays in the playground kicks a ball vertically upward from a height of 0.2 m with a speed of 10 m/s. How much time does the ball spend above the height of the fence?
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OpenStudy (anonymous):
|dw:1328976928020:dw| find u' and then use t=v-u'/g v=0 at top most point so find time taken to go maximum that multiplied by 2 gives time above the fence FIRST FIND u'
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