Question

After a tornado, a 0.55g straw was found embedded 2.3cm into the trunk of a tree. if the average force excerted on the straw by the tree was 65N, what was the speed of the straw when it hit the tree?

Answer 1

(Kinetic energy of straw) = Work = (Force)x(penetration distance)
(1/2) M V^2 = F*X

V = sqrt(2F*X/M)

Answer 2

2.32

Answer 3

74 m/s