Let's convert the final angular speed of the disk into rad/s:
while the initial angular speed is zero.
So, the angular acceleration of the disk is
The radius of the disk is half the diameter:
And so, the tangential acceleration is the angular acceleration times the radius:
Forces are considered balanced when all of the combined forces lead to no change in the motion of the object. For example, when a book is sitting on a table, the force of gravity is pushing downward and the normal force is pushing upward with exactly the same amount of force. Since they are equal and opposite forces, the book does not move.
Unbalanced forces exist when there are unequal forces acting upon the object, which leads to a change in the state of motion. Unbalanced forces can lead to a change in direction, a change in speed, or both a change in direction and in speed.
It is the first one. But if you have this question you are not a little boy
A, 2 molcules
H2O is one molecule, it has 3 atoms (two hydrogen and one oxygen)
2 H2O are two water molecules
