Experimental tests have shown that bone will rupture if it is subjected to a force density of 1.03 x 10° N/m². Suppose a 70.0-kg person carelessly rollerskates 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 1.5 cm?, 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 10.0 ms?

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Chapter1: Units, Trigonometry. And Vectors
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1. Bone fracture (8.12)
Experimental tests have shown that bone will rupture if it is subjected to a force density of
1.03 x 10° N/m?. Suppose a 70.0-kg person carelessly rollerskates 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 1.5 cm?, 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 10.0 ms?
Transcribed Image Text:1. Bone fracture (8.12) Experimental tests have shown that bone will rupture if it is subjected to a force density of 1.03 x 10° N/m?. Suppose a 70.0-kg person carelessly rollerskates 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 1.5 cm?, 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 10.0 ms?
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