# Search results

1. ### Physics of a punch: compression, stress/strain, etc.

Okay so I guess I'm going through with this. Thanks for the help guys. I don't want to use a scale because it does all the work for you. I know they have things that do this in gyms, but that takes the fun out of it. Plus, i can describe the physics this way and get a higher grade on my...
2. ### Physics of a punch: compression, stress/strain, etc.

But the volume will change, wont it? My fist compacts it and forces it downward. as long as it doesn't just go out to the sides, the volume will have decreased. And the reason why I don't just hit my punching bag is because the bags are not equally compacted on the inside. It's more compacted...
3. ### Physics of a punch: compression, stress/strain, etc.

Hello, I am working on a project for my physics class and I'm not sure how to proceed. I decided to do mine on the physics of a punch, and I have a few ideas of how I can collect data, but I'm not sure if I'm looking at it the right way. I was going to make a soft clay block and find it's...
4. ### Basic inclined plane problem

First you need to find the component of the block's weight in the direction of the motion. Multiply 5kg by 9.81 m/s^2 to find the weight. Now multiply this by the cosine of 22 degrees ( 5 x 9.81 x cos22). This will give you the force acting against friction. Note: it always helps to draw a...
5. ### Anyone here play portal? Mechanics question

This is a great question. I think the answer would depend on whether or not a portal's relative position can be changed. If so, then I would say yes, you could lift the cardboard. Consequently, your legs would be forced to bend downwards to make room for your torso underneath the table...