When you hold a yo-yo in your hand, it has potential energy: it stores energy because it’s high above the floor. When you release it, the potential energy is gradually converted into kinetic energy (the energy something has because it’s moving).
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How does a yoyo work physics?
It builds linear momentum, which is the momentum to keep going straight up and down, and it also builds angular momentum, which is the momentum to keep rotating. Going up and down, a yo-yo continually cycles between having potential energy and having kinetic energy.
How do you find the acceleration of a yoyo?
What kind of motion is Yoyo?
Yo-yos display both linear momentum (moving up and down on the string) and angular momentum (spinning around). The angular momentum is what makes yo-yos the perfect tool for doing different tricks. A spinning object always tries to maintain its angular momentum, regardless of any forces trying to hold it back.
What forces act on a yoyo?
When you release a yo-yo, gravity acts on its center of mass to pull the yo-yo downward. Because the string of the yo-yo is wrapped around the yo-yo’s axle, and because one end of the string is attached to your finger, the yo-yo is forced to rotate as it drops. If the yo-yo could not rotate, it would not drop.
What makes a yoyo come back?
However, a momentary tug on the string causes the friction between the string and the axle briefly to increase so that the axle no longer slips within the string. When the axle thus stops slipping, the angular momentum of the spinning yo-yo is sufficient to cause the string to wind around the axle.
In what direction will the yo-yo roll?
This torque is in the opposite direction so the yo-yo rolls clockwise. At any angle between there is a horizontal and vertical component to the force that contribute to the clockwise and counter-clockwise torques respectively.
How do you find the moment of inertia of a yoyo?
Since a yo-yo is approximately a solid cylinder spinning about an axis through its center we can use the following formula to find its moment of inertia: I = 1 2 MR2 where M is the mass and R is the radius of the cylinder. The more mass away from the axis of rotation, the greater the yoyo’s moment of inertia.
What is the increase in the rotational kinetic energy of the yo-yo?
The increase in the rotational energy of the kinetic energy of the yo-yo is, 0.207 J 0.207 textJ 0.207 J.
What does yo mean in physics?
Vxo is Initial velocity (along the x-axis) Vy is the velocity (along the y-axis) Vyo is initial velocity (along the y-axis) g is the acceleration due to gravity.
What are the parts of a yo-yo and how do they work together?
Background. A yo-yo is a toy that has two disks connected together and sandwiching a long string. Traditionally made of wood, the disks are now commonly made of plastic. Attached to the center of the disks, the string winds, unwinds, and rewinds, while attached to a person’s finger.
Is a yoyo a wheel?
A yo-yo – which is a simple wheel and axle machine – is the basis for several compound systems.
Does a yoyo bounce?
When a yo-yo that has a string wrapped tightly around its axle reaches its full extension, it automatically bounces back upwards, the string re-winding in the process.
How does the string of a yo-yo get the yo-yo spinning quizlet?
How does the string of a yo-yo get the yo-yo spinning? The string pulls on the outside edge of the yo-yo’s spindle and at right angles to the lever arm between the yo-you’s rotational axis and the point at which the force acts.
How do you yo-yo a yo-yo?
Is Yoyo potential or kinetic energy?
When the yo-yo is held above the ground, the yo-yo has potential energy from the gravity that is already pulling it down. As the yo-yo falls, that potential energy changes to kinetic energy, which increases as the yo-yo falls down. As the toy climbs back up, the kinetic energy changes back to potential energy.
How do you make a yoyo spin?
How do we get mechanical energy?
Mechanical energy is produced by sourcing potential and kinetic energy and turning it into power. Examples of this would be steam, water, wind, gas, or liquid fuels that power turbines. Machines are often used to generate other forms of energy through conversion before being used as power.
Can all yoyos sleep?
String tension, or how tightly twisted the string is, is very important on fixed axle yo-yos. If the string is twisted too tightly, the yo-yo cannot spin in the loop at the end and will not sleep. But if the string is not twisted tightly enough, the yo-yo will not return.
Why is my yoyo not binding?
This is because there is not enough string for the yo-yo to start the bind. If the distance between the pinched fingers and the yo-yo is too long. The string can become knotted inside the yo-yo. If this happens to you, try throwing the yo-yo a few times to release the knot.
Why can’t I wind my yoyo?
On yo-yos with bearings, if you try to wind it up, it will just spin and won’t wind. To wind this kind of yo-yo, use your thumb to pin down the string against the inside edge of the yo-yo whilst winding.
How does the pulling of an object at a certain angle affect its rotation?
A pull of the string at an angle greater than the critical angle will produce a counterclockwise rotation of the spool; it rolls to the left. A pull at an angle less than the critical angle will produce a clockwise rotation of the spool; it rolls to the right. At the critical angle a harder pull may produce sliding.
How fast does a yoyo fall?
As noted above, in free fall, the yo-yo should take t = √(2(0.51 m)/(9.8 m/s2), or 0.32 s to fall the same distance (and its final velocity would be v = √(2(9.8 m/s2)(0.51 m), or 3.2 m/s).
What is the law of inertia in physics?
Newton’s First Law of Motion (Inertia) An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
How do you use moment of inertia?
