Recent content by momiki

Would it be better, then, to calculate angular acceleration from the kinematic equation vi*t+1/2at^2 = d. Then plug that acceleration into the torque equation rF = I(ALPHA) and use the inertia of a rod about one end, or I=(1/3)ML^2 for inertia. Not sure if the best way to model the fence is...

how can PE be applied here? I know that PE = m*g*h, but the fence is technically resting on the ground, with a mass distributed through the height of the fence?

alright, in that case I don't see how the final rotation rate would help anyways considering that I want to find the force at the point of impact? As for force of gravity, at the point of impact it would be downwards (from 90 degrees) and thus negligible, correct?

Thank you for the reply! For the first part I copied it down wrong ωi = 0rpm ωf = 2pi*.25 / .81 = 1.939 rad/s ALPHA(angularAcceleration) = ωf - ωi / Δt = 1.939/.81 = 2.394 m/s/s ------------- As for the specifics, the man does not come down with the fence. The only specification...

Homework Statement A man jumps at a fence. The fence hits the ground in 0.81 seconds, and the height of the fence is 1.24 meters. What is the angular acceleration of the fence? What is the force exerted by the man on the fence? The fence has a mass of 40 kg. Homework Equations...