Jump to content

• entries
23
• comments
37
• views
2,489

Impulse and Momentum

1,448 views

This video demonstrates perfectly what we have learned about all week in AP-C Physics. It first starts off by saying impulse equals force times time. Then it goes on to say that that all is equal to the change in momentum. Those are the formulas we have been working with the past week, which we all call "Jimpulse." The example in the video is great in that it talks about the force applied by a bat to a baseball, and why bunts work the way they do. I always knew that bunts obviously make the ball go a shorter distance, but this video made me think about it in a physics way. Since the time the ball is touching the bat is less, the impulse will be less, and therefore, goes a short distance. In order to get a home run, and to maximize the impulse, you need to keep the bat in contact with the ball for as long as possible (have a good follow through). It all makes sense now to physics!

Recommended Comments

Blake was also explaining to me today about the follow through. In all sports when you follow through, the impulse increases because the time that you are in contact with the object increases. This is true for many sports like baseball and golf. If you follow through on your swing, the time the force acts on the object increases, which means a greater impulse. If impulse increases, considering mass stays the same, the velocity increases. Assuming you arent changing the angle of contact, for maximum ball flight you want to maximize velocity by increasing impulse!

Share this comment

Link to comment

Blake was also explaining to me today about the follow through. In all sports when you follow through, the impulse increases because the time that you are in contact with the object increases. This is true for many sports like baseball and golf. If you follow through on your swing, the time the force acts on the object increases, which means a greater impulse. If impulse increases, considering mass stays the same, the velocity increases. Assuming you arent changing the angle of contact, for maximum ball flight you want to maximize velocity by increasing impulse!

Share this comment

Link to comment

Cool! I never thought of follow-through that way. I always assumed that the mindset of following through just created a more powerful swing in the first place, but this makes much more sense. So does a pitcher with longer arms have an advantage over a shorter-armed pitcher? (Strictly talking maximum ball velocity)

Share this comment

Link to comment

Consider sports equipment design. A jai alai basket delivers a high amount of force and is curved not only for accuracy and catching, but also to increase the duration of the impulse.

It's no wonder these balls can reach hundreds of miles an hour of speed.

Share this comment

Link to comment

So I read both blogs that have to do with follow through increasing momentum so far, and as an avid badminton player (don't hate on my whiteness) I'm starting to wonder how professionals reach 100 mph speeds with shuttlecocks that have a great amount of drag and if the racket only comes into contact with the shuttlecock a short time.

Share this comment

Link to comment

If you watch the slow moe on the baseball hits, we see that the ball bounces off the bat relatively quickly, and so a follow through does not increase the time the force is put upon the ball, so with that in mind why follow through, the ball bounces off the bat and then they still swing another 90 degrees or so.

Share this comment

Link to comment

Could it be that a follow through just ensures the player doesn't anticipate the close and pull up, decreasing force on the ball?

Share this comment

Link to comment
Add a comment...

×   Pasted as rich text.   Paste as plain text instead

Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

×
×
• Create New...