Comments on: physics help energy conservation and projectiles? http://www.energy--talk.com/alternative-energy/physics-help-energy-conservation-and-projectiles/113/ How Can We Be More Energy Efficient? Wed, 08 Feb 2012 23:34:30 +0000 http://wordpress.org/?v=2.6.5 By: Helmut http://www.energy--talk.com/alternative-energy/physics-help-energy-conservation-and-projectiles/113/#comment-210 Helmut Mon, 17 Sep 2007 12:19:33 +0000 http://www.energy--talk.com/alternative-energy/physics-help-energy-conservation-and-projectiles/113/#comment-210 (a) (1/2)mv1^2 = (1/2)mv0^2 + mgh v1^2 = v0^2 + 2gh v1^2 = (12)^2 + 2(9.80665)(2.75) v1 ≈ 14.06899 m/s ≈ 14.1 m/s (b) h1 = h0 + v0t - (1/2)at^2 t^2 = 2(2.75)/9.80665 t ≈ 0.5608439 s ≈ 0.561 s or 561 ms (a) (1/2)mv1^2 = (1/2)mv0^2 + mgh
v1^2 = v0^2 + 2gh
v1^2 = (12)^2 + 2(9.80665)(2.75)
v1 ≈ 14.06899 m/s ≈ 14.1 m/s

(b) h1 = h0 + v0t - (1/2)at^2
t^2 = 2(2.75)/9.80665
t ≈ 0.5608439 s ≈ 0.561 s or 561 ms

]]> By: derith300 http://www.energy--talk.com/alternative-energy/physics-help-energy-conservation-and-projectiles/113/#comment-209 derith300 Sat, 15 Sep 2007 18:52:49 +0000 http://www.energy--talk.com/alternative-energy/physics-help-energy-conservation-and-projectiles/113/#comment-209 See in real life you would just walk over to the bb and measure how far it is from your gun. so much for real life aplications! See in real life you would just walk over to the bb and measure how far it is from your gun. so much for real life aplications!

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