Hello, I'm stuck on this problem and I think its because I am lacking the calculus to get the correct answer.
A shaft is turning at 65 rad/s at time = 0. After, its angular acceleration is given by:
a= -10.0 rad/s^2 - 5.00t rad/s^3 where t is the elapsed time.
Find its angular speed...
Hmmm. I have a question...
We know that the tangential acceleration (At) is equal to the radius (R) multiplied by angular acceleration (Ar), of which At and Ar are vector components.
At = R Ar
Then I was told that Ar = At/R is not a vector equation. Why is that true?
~Seph :confused:
Hello everyone!
I need to solve the angular acceleration on a sunglass bin on an over head console of a car.
The sunglass bin rotates open.
It has a torsional spring and gravity that forces it to open and a small rotary damper that slows it down. There is a gear on the sunglass bin and on...
I think I'm starting to abuse this forum. Anyways, it seems that I haven't grasped the concept of angular acceleration yet since I'm having trouble solving this problem:
Suppose I have a disc laying on the x-y plane with center at the origin. Suppose the disc is rotating about the z-axis with...
Setting the Stage:
A uniform sphere has a mass of 100 kilograms and a radius of 10 meters.
It is located at [0,0,0]
It is in static equilibrium.
We are in constant time.
We are in a vacuum, there is no gravity, friction, or any other forces to act upon our sphere.
We are using a...
Heres the problem. I'm trying to solve it at the moment, and I'll be posting what I have done so far. I'm very short on formulas for this so I will need help. Thanks a lot.
1) a) Determine angular acceleration of a wheel, which has a velocity of 200 rad/min after rotating for 1.5s from...
I missed a week of school because of a virus. During that week, I missed taking a lot of physics notes. When I returned, I received a problem from my teacher that he wants me to solve. I have the notes now but I don't understand them because they weren't taught to me, so may someone please help...
Hi everyone,
I'm just a bit confused about calculating angular acceleration and knowing when it is constant or not. Here's the problem:
A gymnast is swinging on a horizontal bar, and we're asked to calculate the forces in his hands when he is at 90 degrees with the bar. He was originally...
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Okay, so there's a car traveling 97km/h (26.94 m/s). It's wheels have a diameter of 76cm (0.76 m), so the radius of the wheels are 0.38 m. I'm supposed to find the angular speed of the wheels about the axle.
Can I say the speed of a tangent from the wheels is 26.94 m/s and use that to find...
At the time, it is cramped in the microcosmos of forum Theory Development; therefore I scrambled out to take the fresh air among the admirers of cosmic space.
I have the important occasion to talk about gravitation and inertia.
I managed to find the formula for gravitational electron mass in...
I don't really know what to do on this problem. So if someone could get me pointed in the right direction I would appreciate it.
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 7.0 rev/s in 13.0 s. At this point the person doing the...
Problem 5. given:g=9.81m/s^2.
A light string 1.20 m long is wrapped around a solid cylindrical spool with a redius of 0.0195 m and a mass of 0.380 kg. A 8.40 kg mass is then attached to the free end of the string, causing the string to unwind from the spool.
a. What is the angular...
The Tub of a washer goes into a spin cycle, starting from rest and gaining angular speed steadily for 8 s, when it is turning at 5 rev/s. At this point the person doing the laundry opens the lid, and a safety switch turns off the washer. The tub smoothly slows to rest in 12s. Through how many...
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A rotating wheel requires 2.93 s to complete 37.0 revolutions. Its angular speed at the end of the 2.93 s interval is 97.1 rad/s. What is the constant angular acceleration of the wheel?
I know this should be easy. I'm just missing something. I figured 37 rev = 232 rad (=theta). Then I used...