Recent content by Psych Berry

At the end of a problem (I'm sure I did all the math correctly, that's not an issue) I'm supposed to graph the corresponding resultant vector. However, along with the magnitude of the vector, the angles given are in component form: θx, θy, θz. I've never encountered this before, and although it...

That's definitely true, thanks! I for sure trust your physics judgment over the program's.

It's an online pre-assignment, said my answer was incorrect. I tried playing around with sig figs and signs (in case the question forgot it's supposed to be magnitude), but I've tried 5 times and haven't been able to get it correct.

I can't seem to master this equation, because I think I'm doing things right and I'm not. Homework Statement When a 410 baseball gram is hit, its velocity changes from +28.87 m/s to -22.34 m/s. The baseball is in contact with the bat for 56.10 milliseconds. You may assume that the balls...

Thank you! That should have been so obvious. I got it right this time.

Homework Statement A handball of mass 668 grams is thrown straight against a wall with a speed of 13.36 m/s. It rebounds straight back out with the same speed. The average force exerted on the wall by the ball is 12 N. How long is the ball in contact with the wall? Homework Equations...

Magnitude is a scalar, NOT a vector.

Well then, if it exists can anyone enlighten me as to how to obtain it?

No, if the magnitude of acceleration is zero, then the magnitude of velocity will not change. The vector acceleration does not equal zero, and therefore the vector velocity will not equal zero either.

Maybe that's true, my lab manual where the questions are stated is definitely not written by people with doctorates in physics. But that's merely terminology. It wouldn't change my question. If there is no such thing as "horizontal coefficient of restitution" then what would the corresponding...

Yes and yes. If this problem were not referring to magnitude, the equation would be a = (v^2)/r

63 rpm suggests that the magnitude of velocity is constant. Therefore to find the magnitude of acceleration you merely need to find the derivative of velocity. So what is the derivative of a constant?

Homework Statement I'm supposed to determine the [vertical] coefficient of restitution of a tennis ball, and the horrizontal coefficient of restitution, and if possible produce an equation or ratio connecting the two. Vertical CoR: 0.760 Constant x-component velocity: 0.853 m/s Homework...

Thank you! This makes perfect sense, I do remember someone bumping into the table at one point in the experiment. I didn't even think to readjust the track.

Homework Statement A cart is released from rest with varrying masses down an inclined track. Determine whether or not mass affects acceleration in this case. This is what I calculated through all the data: θ = approx 5 degrees M1: Vavg = 0.7816 --> Aavg = 0.977 M2: Vavg = 0.8385 --> Aavg...