Homework Help: Physics

Posted by Aria on Sunday, June 24, 2012 at 11:49pm.

A football was thrown from the line of scrimmage with a velocity of
30 m/s at an angle of 30o above the horizontal.

(a) Determine the time required by the ball to reach the maximum height of its flight path.

(b)Determine the distance from the line of scrimmage that a receiver must travel in order to catch the ball just before it hits the ground.

Physics - Henry, Monday, June 25, 2012 at 10:10pm
Vo = 30m/s @ 30 Deg

Vo = 30m/s @ 30 Deg.
xo = hor = 30*cos30 = 26 m/s.
Yo = ver = 30*sin30 = 15 m/s.

a. Tr = (Y-Yo)/g.
Tr = (0-15) / 9.8 = 1.53 s. = Rise time
or time to reach max. ht.

b. D = Vo^2*sin(2A)/g.
D = 900*sin60 / 9.8 = 79.5 m.
Physics - Henry, Monday, June 25, 2012 at 10:14pm
post it.

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