physics

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a kicker kicks a football from the 5 yard line to the 45 yd line ( on the same half of the field). Ignoring air resistance, where along the trajectory is the speed of the football a minimum. what formuls is used and show work

a) at the 5 yd line, just after the football leaves the kicker's foot
b)at the 45 yd line, just before the football hits the ground
c)at the 35 yd line when the ball is coming down
d) at the 25 yd line , when the ball is at the top of its trajectory

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