Question

A Yo-Yo is a toy in the form of a disc with concentric shafts. A string has been wound on the shaft. If it is being suspended from the free end, then the string unwinds and winds so that the Yo-Yo falls down and rises up again and again. The ratio of the tension in the string when it is descending and ascending is
$\begin{align}
  & A.\dfrac{1}{2} \\
 & B.\dfrac{1}{1} \\
 & C.\dfrac{R}{{{R}_{0}}} \\
 & D.\dfrac{{{R}_{0}}}{R} \\
\end{align}$

 

Answer 1

Hint: A yo-yo which is also spelled as yoyo is a toy included of an axle which is connected to two disks and a string is being looped around the axle, equivalent to a spool. One of the most primary tricks is known as the sleeper, where the yo-yo is being spinning at the end of the string for a remarkable amount of time before it returns to the hand.

Complete answer:
First of all let us take a look at the physics behind the YO YO toy. If we let go of the yo-yo, gravity will pull it down. It is also compelled to rotate as a result of the string getting fastened to your finger and also will wound around the YO YO's axle. As it drops, the YO YO's potential energy is varied into kinetic energy which is known as the energy of motion.

The tension in the YO YO is found as independent on the radius of the disc while it is ascending or descending. That is after the swing also the tension will be the same in both cases.
Hence
$T=T$

So, the correct answer is “Option B”.

Note:
Just as a yo-yo has two kinds of momentum. One is linear momentum since it moves in a straight line, up and down on the string and also angular momentum since it spins around. It also has two kinetic energies. They are the kinetic energy of movement and kinetic energy of rotation.