Recent content by skinnyabbey

A solid horizontal cylinder of mass 13.1 kg and radius 1.22m rotates with an angular speed of 2.99 rad/s about a fixed vertical axis through its center. A 0.258kg piece of putty is dropped vertically onto the cylinder at a point 0.853m from the center of rotation, and sticks to the cylinder...

thanks.it worked.

A uniform solid disk of radius 4.18 m and mass 193 kg is free to rotate on a frictionless pivot through a point on its rim. The acceleration of gravity is 9.8 m/s2 : If the disk is released from rest in the po- sition shown by the solid circle, what is the speed of its center of mass...

Can anyone help me out? :smile: The top has a moment of inertia of 0:0002 kg.m2 and is initially at rest. It is free to rotate about a stationary axis AA'. A string, wrapped around a peg along the axis of the top, is pulled in such a manner as to maintain a constant tension of...

I thought torque was rotational inertia multiplied by acceleration(in radians). You found your torque by multiplying the distance by the force? Can you exlplain your steps bcz I have a test on Friday on Rotation, and this could be very useful

that didn't answer my question, but thanks regardless

Can anyone briefly explain this topic. I have a test on Friday, and I'm not very comfortable with this topic. How do I know the direction of the force(s) when given a problem? Can anyone with a good understanding of this topic briefly go over the basics of this topic. Thank you.

cheers thanks. I've worked it out. Thanks a lot again. So angular displacement= angular velocity *time. And since time is scalar, its the same for the angular velocity, velocity, angular acceleration. etc. right? thank you

firstly, i converted the angle to radians. I then tried to find the displacement using (theta *r),...and then the velocity. But i don't think I'm using the right formula because the final answer does not look right.

:smile: The speed of a moving bullet can be deter- mined by allowing the bullet to pass through two rotating paper disks mounted a distance 69:1 cm apart on the same axle. From the angular displacement 39:7 ± of the two bul- let holes in the disks and the rotational speed 596 rev=min...