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goal

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Kicking a field goal 2007-03-13
san pose la question :
A football player attempts a field goal by kicking the football. The ball follows the path modelled by the equation h= -4.9^2+10t+3, where h is the height of the ball above the ground in metres, and t is the time since the ball was kicked in seconds. *the ball must clear the uprights for the field goal to count. The uprights are approximately 5 m high. How long does the ball stay above 5 m in height?
Penny Nom lui répond.
Maximizing the angle to the goal mouth 2004-05-15
Yogendra pose la question :
You are running down the boundary line dribbling the ball in soccer or hockey. Investigate where in your run the angle the goal mouth makes with your position is at a maximum.
Penny Nom lui répond.
 
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