But how would I represent that with a vector diagram? The only thing that might would affect it would be the change in rotational axis going from vertical to horizontal...but that's not really a vector. That's why I don't really know where to go with this problem because when the rotation is...
Homework Statement
A wheel spins at 45rpm with its spin axis vertical. After spinning 15 sec, it is spinning at 60rpm with its axis horizontal. Find its average angular acceleration and the angle the avg acceleration vector makes with the horizontal.Homework Equations
Sorry, I can't really do...
I had the radius in the first post, the first time I posted it. I never edited my first post.
We use d as the distance to the center of rotation (which is the radius) so that's just how I wrote it.
Thank you for your help, though.
Ah, good point on the friction.
Did I still do it correctly, though?
Oh, and I misread your number that you said for problem 1. I thought you not only changed the units, but the number as well. I'm sorry.
Edit: Oops, I just noticed that my previous post's edit was after your post!
Alright, but wouldn't the numbers I calculated still be correct? I just have to change the units?
Like, if I used the same equation vT = rw (w will be omega) for vT= 2 m/s, and r= 1m
w would equal 2 rad/s, right? The units come out of the equation... Or do I still have to convert...
First Problem: How would omega have to be in rad/s? I thought that because the units were all in kilometers, and kph, then the units would at least be radians per hour...? As long as the units are all the same. The radians would just be on a larger scale due to the large radius of the "circle"...
Basically, I've missed a week straight of school due to a family illness, and I get back today to find that our normal physics teacher is sick, and we have a substitute. I was able to read a bit on my own and understand most of it, but these are some that have stumped me a bit.
I do not know...
This question is trying to trick you, in a sense.
The thing about projectile problems is understanding the components. This problem is actually giving you the heights, in which all you have to do is find the velocity at those given heights with respect to gravity.
All projectiles launched...
Our teacher is notorious for giving us variables that are not needed, so I'm doubting the mass of the plank matters. Plus the fact that we've never had to mess with the mass of the lever itself. Although, the mass is 210 N, so dividing by 9.8,you find the mass of the load is greater than the...
1. A pair of brothers have a 20kg, 3.5m plank they want to use as a lever. They use a fulcrum which is 0.75m from the load mass. If they push down one end of the lever with a force of 210N, then they can move the Load mass away. What is the upward force exerted on the large mass? If the...