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Initial velocity, u = 25 m/ s Final velocity, v = 0 m/ s Acceleration, a = -5.5 m/s² v = u + at 0 = 25 + (-5.5)t Time taken, t = 25/5.5 = 4.5 s

v² = u² + 2as so, v² = 0² + 2(2.8)(54) Hence, v² = 302.4 => v = 17.4 m/ s       v = u + at so, 17.4 = 0 + 2.8t => t = 6.2 seconds :)>

... military." We have been seeing Obama' s "Civilian Defense" force all summer long . https://www.youtube.com/watch? v =Tt2yGzHfy7s From what I am thinking, ...

...-u²)/2a = (750² - 0²)/(2*65000) = 4.3 m  ( wow ! what a long rifle) b) t = ( v - u )/a = (750 - 0)/65000 = 0.012 s = 12 ms c) s = s₀ + ut + ½gt² where s₀ = 1m when bullet...

a) By v = u + gt =>5 = 10 - 9.8 x t =>t = 0.51 sec (b) by v = u + gt =>0 = 10 - 9.8 x t =>t = 1.02 sec (c) by s = ut - 1/2gt^2 =>h = 10 x 1.02 - 1/2 x 9.8 x (1.02)^2 =>h = 5.01 m (d) T = 2t =>T = 2 x 1.02 = 2.04 sec

...0.12 * 330kg * 9.81m/s² * 500m * (4/5) = 9.32e4 J (c) KE = U - W = 8.78e5 J (d) 8.78e5 J = ½ * 330kg * V² V = 72.9 m/ s which should be rounded to 73 m/ s owing to the data "0.12"...

(a) By s = ut + 1/2gt^2 =>100 = 0 + 1/2 x 9.8 x t^2 =>t = √20.41 =>t = 4.52 sec (b) By v ^2 = u ^2 + 2gh => v ^2 = 0 + 2 x 9.8 x 100 => v = √1960 => v = 44.27 m/ s  

His handlers directed him to say this because it was killing him in the polls.  He doesn't really care or even know what' s going on right now.