How large torque is needed for acceleration

AI Thread Summary
To calculate the torque needed to accelerate a disk with a radius of 2 cm and mass of 2 kg from rest to 60 rad/s in 6 seconds, one must first determine the moment of inertia of the disk, which is 0.5 * mass * radius^2. The angular acceleration can be found by dividing the change in angular velocity by the time taken. Once the angular acceleration is known, torque can be calculated using the formula torque = moment of inertia * angular acceleration. Providing a detailed attempt at the solution, including relevant equations, is essential for receiving effective assistance. Engaging with the problem will enhance understanding and facilitate learning.
bolskipolski
Messages
7
Reaction score
0
Hi! I am trying to solve a physics task, but can't get it right. Would really appreciate some help..

A disk of uniform thickness has a radius of 2cm and the mass of 2kg. How large torque is needed to accelerate it from the rest up to 60 rad/s in 6seconds?
 
Physics news on Phys.org
To get help you must show some effort. Read the rules regarding homework help and follow the template (you have posted the question but need to list the relevant equations and your attempt at a solution).
 
What he said. You said you can't get it right which implies you have at least had a go. Tell us what you did and we can help you find the error. This approach helps you learn and saves us having to repeat stuff you already know.
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

How Does Torque Affect Angular Acceleration in a Circular Disk?
Replies
8
Views
3K
Angular acceleration problem for a pulley used to raise an elevator
Replies
8
Views
2K
How to Apply Derivatives in Physics Problems?
Replies
9
Views
1K
Atwood's with a cylinder - Rotational Motion
Replies
13
Views
858
How Does Torque Affect the Motion of a Disc Pulled Across a Table?
Replies
3
Views
2K
Determine torque required to accelerate the flywheel
Replies
2
Views
4K
What is the angular acceleration of the rod?
Replies
18
Views
7K
Torque to lift object by cable on a drum accelerating
Replies
8
Views
4K
Angular momentum conservation on a merry-go-round
Replies
5
Views
2K
Torque, beam, angular acceleration problem
Replies
4
Views
4K

Hot Threads

Recent Insights

Back
Top