Change the chapter
Calculate the average pressure exerted on the palm of a shot-putter's hand by the shot if the area of contact is $50.0 \textrm{ cm}^2$ and he exerts a force of 800 N on it. Express the pressure in $\textrm{ N/m}^2$ and compare it with the $1.00 \times 10^6 \textrm{ Pa}$ pressures sometimes encountered in the skeletal system.
Question by OpenStax is licensed under CC BY 4.0.

$1.60 \times 10^5 \textrm{ N/m}^2$

This pressure is 16.0% of that sometimes found in the skeletal system.

Solution Video

OpenStax College Physics for AP® Courses Solution, Chapter 11, Problem 21 (Problems & Exercises) (1:01)

Sign up to view this solution video!


No votes have been submitted yet.

Quiz Mode

Why is this button here? Quiz Mode is a chance to try solving the problem first on your own before viewing the solution. One of the following will probably happen:

  1. You get the answer. Congratulations! It feels good! There might still be more to learn, and you might enjoy comparing your problem solving approach to the best practices demonstrated in the solution video.
  2. You don't get the answer. This is OK! In fact it's awesome, despite the difficult feelings you might have about it. When you don't get the answer, your mind is ready for learning. Think about how much you really want the solution! Your mind will gobble it up when it sees it. Attempting the problem is like trying to assemble the pieces of a puzzle. If you don't get the answer, the gaps in the puzzle are questions that are ready and searching to be filled. This is an active process, where your mind is turned on - learning will happen!
If you wish to show the answer immediately without having to click "Reveal Answer", you may . Quiz Mode is disabled by default, but you can check the Enable Quiz Mode checkbox when editing your profile to re-enable it any time you want. College Physics Answers cares a lot about academic integrity. Quiz Mode is encouragement to use the solutions in a way that is most beneficial for your learning.

Calculator Screenshots

OpenStax College Physics, Chapter 11, Problem 21 (PE) calculator screenshot 1
Video Transcript
This is College Physics Answers with Shaun Dychko. We're going to find the pressure exerted on a shot-putter’s hand while they're throwing the shot put and so we need to go force divided by area to find that pressure. The force we're told is 800 newtons and the area is 50 centimeters squared which we have to convert into meters squared by multiplying by one meter for every 100 centimeters. We multiply by that twice because it's centimeters squared. We get 0.005 meters squared. So the force divided by area is 800 newtons divided by 0.005 meters squared which is 1.60 times ten to the five newtons per meter squared. We could have written Pascals there instead of newtons per meter squared if we wanted. Now comparing this to pressures often found in the skeleton, we take that 1.6 times ten to the five and divide it by one times ten to the six newtons per square meter and that gives us 0.16. So that means this pressure the shot-putter is experiencing in the palm of her hand is 16 percent of what is sometimes found in the skeletal system.