Homework Help: 12th Grade Calculus

Posted by Leanna on Wednesday, October 27, 2010 at 6:19am.

When a ball is thrown straight down from the top of a tall building, with initial velocity 30 ft/sec, the distance from the release point at time t in seconds is given by s(t)=16t^2+30t.

If the release point is 300 ft above ground, what is the velocity of the ball at the time it hits the ground?

I think you would have to average the feet per seconds but I'm not sure.

12th Grade Calculus - Ron, Thursday, October 28, 2010 at 1:54pm
Use the physics equation:
Vf^2=Vi^2+2ad where Vi is the initial velocity, a is the acceleration due to gravity or 9.80 m/s^2 and d equals your distance

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