What is the acceleration of the crate?
A hippo pushes a 100kg crate of lettuce a distance of 4m in 2 seconds. The hippos power output was 9KW. What was the acceleration of the crate?
Answers
Demiurge42
Assuming the crate was stationary to begin with and acceleration is constant: d = 1/2 a t^2 2d = a t^2 a = 2d/t^2 Plugging in d = 4m and t = 2s a = 2*4m / (2s)^2 a = 2 m/s^2
Brainard
Power = Work/time Work = Force x displacement = Fd Power = Fd/t 9000 = F x 4/2 9000 = 2F F = 4500 N F = ma 4500 = 100a a = 45 m/s^2
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