Question

Experimental tests have shown that bone will rupture if it is subjected to a force density of 1.00×108 N/m2 . Suppose a 69.0 kg person carelessly roller-skates into an overhead metal beam that hits his forehead and completely stops his forward motion.

If the area of contact with the person's forehead is 1.50 cm2cm2 , what is the greatest speed with which he can hit the wall without breaking any bone if his head is in contact with the beam for 11.0 msms ?

Answer 1

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