Your forehead can eithstand a force of about 6.0kN before fracturing while your cheekbone
Added by George W.
Step 1
0 kN (kilonewtons). Show more…
Show all steps
Your feedback will help us improve your experience
Sachin Rao and 61 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Your forehead can withstand a force of about $6.0 \mathrm{kN}$ before fracturing, while your cheekbone can only withstand about $1.3 \mathrm{kN}$. a. If a 140 g baseball strikes your head at $30 \mathrm{m} / \mathrm{s}$ and stops in $0.0015 \mathrm{s},$ what is the magnitude of the ball's acceleration? b. What is the magnitude of the force that stops the baseball? c. What force does the baseball apply to your head? Explain. d. Are you in danger of a fracture if the ball hits you in the forehead? In the cheek?
. Bone fracture. Experimental tests have shown that bone will rupture if it is subjected to a force density of $1.0 \times$ $10^{8} \mathrm{N} / \mathrm{m}^{2} .$ Suppose a 70.0 $\mathrm{kg}$ 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 $1.5 \mathrm{cm}^{2},$ what is the greatest speed with which he can hit the wall without breaking any bone if hiss head is in contact with the beam for 10.0 $\mathrm{ms}$ ?
Bone Fracture. Experimental tests have shown bone will rupture if it is subjected to a force density of $1.03 \times 10^{8} \mathrm{N} / \mathrm{m}^{2} .$ Suppose a 70.0 -kg person carelessly roller-skates into an overhead metal beam that his forehead and completely stops his forward motion. If the area of contact with the person's forehead is 1.5 $\mathrm{cm}^{2},$ what is the greatest speed with which he can hit the wall without breaking any bone if his head is in con- tact with the beam for 10.0 $\mathrm{ms} ?$
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD