Recent content by DKPeridot20

I didn't find the velocity. I don't see how I can without some kind of distance or time... should I be able to?

No. I take it as the speed at which the bat was swung. At the point when it hit the ball, it was going 6.258 m/s. (14 mph)

I'm getting very close, but not quite close enough on this problem: A baseball is struck by a bat such that it makes an angle of 41 degrees form the direction between the batter and the pitcher. The pitch was thrown at 37.995 m/s. The ball was hit with a speed of 6.258 m/s. What was the...

*sigh* I'm SURE there is a perfectly reasonable solution to this problem, unfortunately for me it remains just beyond the next horizon. :cry: The green block (2 kg) is falling at a speed of 29. m/s and is 3.0 meters above the spring. The spring constant is 4.00E3 N/m. What is the maximum...

Thanks very much.

Does E = U + K give me the total mechanical energy? If that is so, in order to find K I have to be able to plug in a value for v. With the info I was given (k, x, and m) I should be able to calculate v, right? How do I rearrange 1/2mv^2 to solve for v? (or do I do that at all...)

I can't copy the pictures but here's a "reproduction" of one: Wall----------box (There's a spring attached to both the wall and the box.) The box is resting on a frictionless surface. The spring has been stretched to the right by a distance given and it's about to be released. It will...

Thanks again. The problem doesn't specify, but the answer is the same distance so I'm assuming they're the same angle...

Oh, okay, thanks very much. I'm getting the right answer now. I also have another problem that is exactly the same except that it deals with a frictionless surface, the box goes up another incline, and the only supplied number is the distance it travels down the first incline. Is it correct...

I have a homework question (due tomorrow) that I cannot figure out how to answer. It is: This problem involves a single surface with a single unknown coefficient of kinetic friction that can be found. A box starting from rest, slides down along an incline a distance of 8.8 meters. The incline...

I've been working on this particular question for some time and am sure that it's very simple but I continue to get the wrong answer... An 18.0 N weight slides down a rough inclined plane which makes and angle of 29.0 degrees with the horizontal. The weight starts from rest and gains a speed...

Thank you.

Hello, I was wondering, if I was in an elevator and wanted to play darts while ascending, would I have to adjust my aim? (In some ways I think I ought to aim higher to account for the time the dart spends in the air, but on the other hand I might not need to.) :rolleyes: