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## For one, falling people aren't in a vacuum - they're surrounded by air.

Jan 13, Assume the tree falls at g and model the center of mass as being 15m up the tree. h = 15sin60 = 13m Assume mgh = 1/2 mV2 at impact. 13mg = 1/2 mV2 => 26g = V2 => V = 16m/s BUT that is the middle of the tree, at twice that distance, V = m/s. 1. keywords: Velocity,Falling,Tree,of,Velocity of Falling Tree.

The above equation can be used to calculate both impact force of a falling ojbect as well as impact force of a horizontally-moving object such as in a car crash or plane crash. The formula can easily be extended to calculate the approximate maximum impact force (a.k.a. peak impact force) by multiplying the resulting average impact force by stumplopping.barg: falling tree. Impact Force from a Falling Object.

The dynamic energy in a falling object at the impact moment when it hits the ground can be calculated as. E = F weight h = m a g h (4) where. F weight = force due to gravity - or weight (N, lb f) a g = acceleration of gravity ( m/s 2, ft/s 2) h = falling height (m). Dec 13, Well, if we ignore air resistance as you suggested, the tree would exponentially accelerate as the force of gravity on the tree increases as the tree falls.

Therefore, the maximum velocity would be the instant before the tree hits the ground. Last edited: Dec 13, Estimated Reading Time: 7 mins. Apr 27, Pittsburgh. Thus, a lb log falls 1 foot = lb force, a lb log drops 3 ft=a lb log falls 5 ft = I once saw a live test with a impact scale that confirmed that a lb log dropped 5 foot made lbs of force. But dropping it 1 foot only making a force equal to static weight seems wrong to me.