a force that produces or tends to produce rotation or torsion
In our physics class we are learning what is a torque, how work, and how we can use it's formula.
To have a good idea of a torque we did a small lab we can said. We use a lever, a ruler, metric masses.
We balanced the ruler we put a clip also to have the balanced quickly as we can see in the picture
With the ruler already balanced, we started getting all the data.
With this data, we resolve to obtain the torque of the 2 masses and we have a close answer, but we are continue learning how to work with torque.
The SI unit for torque is the newton metre (N·m).
But we are not finish learning about torque continue with the lesson of torque we make 3 little test or 3 excercise to know more about it, but we can said that also our class have a lot of fun with that excercies
In this video we can see that we are working with the merry go round and we can ask but how it's apply torque in here in a merry go round we need torque because there is a force that produces rotation. We needed that force to move the merry go round and we needed to maintan the body straight and then ti bring the body to the center.
But you think that we are done with this? No, we are not done we saw a wheel and a rotating board let me tell that it's was so funny also one of my classmate fell down with these experiment we have to spin the wheel and with the force of the spin of the wheel we move. We have to move the wheel to move more. We noticed that here we get used of angular momentum. An angular momentum, Just as an external force changes the total linear momentum of a system of particles, an external torque changes the angular momentum of a rigid body. 
We are almost done with this exhausted day that we had in Physics but to end what we did?
We saw how a gyroscope work and was so cool, because alse we remeber our childhood it's similar to a beyblade and some girls and boys play. A gyroscope is a device for measuring or maintaining orientation, based on the principles of angular momentum, and represents the product of body's inertia and velocity
