Determine the average force on the hand

Reference no: EM13515760

A swift blow with the hand can break a pine board. As the hand hits the board, the kinetic energy of the hand is transformed into elastic potential energy of the bending board; if the board bends far enough, it breaks. Applying a force to the center of a particular pine board deflects the center of the board by a distance that increases in proportion to the force. Ultimately the board breaks at an applied force of 860N and a deflection of 1.6cm .

1. To break the board with a blow from the hand, how fast must the hand be moving? Use 0.50kg for the mass of the hand.

v= ________

For this one im not sure about the correct answer it is either 7.42 or 1.85 im not to sure what i am doing wrong here.

2. If the hand is moving this fast and comes to rest in a distance of 1.6cm , what is the average force on the hand?

F=___________

Reference no: EM13515760

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