# Physics

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?

1. 👍 2
2. 👎 0
3. 👁 1,756
1. (Kinetic energy of straw) = Work = (Force)x(penetration distance)
(1/2) M V^2 = F*X

V = sqrt(2F*X/M)

1. 👍 1
2. 👎 0
2. 2.32

1. 👍 1
2. 👎 0
3. 74 m/s

1. 👍 2
2. 👎 0

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