Posted by Rob on Monday, April 25, 2011 at 4:53pm.
Tom Brady passes a football – at a velocity of 50 ft/s at an angle of 40 degrees to the horizontal – toward an intended receiver 30 yd straight downfield. The pass is released 5 ft above the ground. Assume that the receiver is stationary, is isolated and that he can catch the ball from the ground (a shoestring catch) up to a height of 7 ft when the ball arrives at his position. Will the pass be completed? If not will it be short or long? If the conditions (launch height, distance to receiver, height for catch) are exactly the same but the quarterback can only launch the football at 45 degrees to the horizontal what is the range of speeds he must give the ball at launch so as to make a completion?

Physics  bobpursley, Monday, April 25, 2011 at 4:57pm
using the data, first find the time of flight using horizontal velocity.
Then, knowing the time in air, find the final height.
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