A football is kicked at 37 degrees to the horizontal at 20 m/s from the player's hand at 1m from the ground. Find deltaX.

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anonymous · Answer

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anonymous · Answer

Welcome jvlinh.  For this question you would want to first know the vertical and horizontal components of the 20 m/s at 37 degrees.  Do you know how to use trigonometry to find the components?

anonymous · Answer

First you need to calculate the vertical and horizontal component of the velocity vector.|dw:1383218007011:dw|
Then figure out how much time does it take for the ball to reach back to ground, hint is to use the vertical component. and then we know that there is no field in horizontal direction
so horizontal velocity is constant throughout. distance traveled will be v*cos(37) * time of flight.
Calculation can be a bit simplified knowing the fact that the trajectory is symmetrical about y axis.