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In 3 of the videos, there were real-life examples such as; Newton's cradle, rotation of Earth and the metronome. So, in all of them, the similarity was their main aim which is the circular motion. During their motion process, it is obvious that they will continue to move forever.

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There are similarities in these videos. One of them is that objects are in continuous and circular motion. They are all moving respect to the center which causes a circular motion. They all have constant velocity if there aren't any external forces.

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I think that in these videos there are three similarities. The first one is that the objects in all of the videos have a constant frequency. That's why they always repeat the same type of motion in one second. This is because they have have a constant speed. The second similarity is that in all videos, there is an external force that acting on the objects. That's why while the speed of the object remains the same, its velocity changes due to change in direction. For instance, the earth would go somewhere else in the space, if there wasn't the gravitational attraction force of the sun. The balls would have completed their revolution if there was no gravitational force, and the stick of the metronome would have go straight, if there wasn't an opposite force. The last similarity is that they all are likely to make circular motion, if there was no external force acting upon them.

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In all of these videos, the objects are performing a continuous motion.

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In all the videos, the objects moves continious until an external force aplied them.

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Ece Çelik                            The similarity of the videos is that the motion of the objects were continious until an external force applied to the objects. In addition all of the videos include objects that undergo circular motion.

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Ece Çelik                            The similarity of the videos is that the motion of the objects were continious until an external force applied to the objects. In addition all of the videos include objects that undergo circular motion.

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These 3 videos have objects which are in continious motion if external forces are zero so they all have periods. Also, they are all connected to a center and moves around this center. All of these videos have circular motion in them. They all have angular velocities.

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The similarities in the videos were that all of them show motion which I think could be represented with trigonometry.

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In all those videos, there where moving objects. They were continuing to move untill an externel force starts to act on them. The objects were moving because there were just a little amount of energy loss. This can be explained by Newton’s Laws of Motion

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The similarities between these videos is that all of the videos are showing a continuous motion. There are physical acts on each of the motion which are called forces and the similarity in the videos is that in every video there is a negligable friction force and therefore a little loss of (kinetic or potential) energy, and that's why they are continuing their motion, small energy losses during their motion.

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In all of the videos there is a continious motion until an external force is exerted on the objects. I think that the animation of rotation of Earth and Newton's Cradle have a relation with trigonametric functions because we use unit circle in trigonametry and both of the examples include spheres that are moving. It represents the radian. The metronome also has a relation with trigonametry. I think that it represnets the angle, degree.

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All the videos show a continous motion happening and some of them can change the speed the motion is being done so maybe these motions could be represented by a function.

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I think that the similarity of these three videos is that the motion observed in all of them are continuous. Moreover, all of them were a bit mysterious because they make us to wonder what is the "mystical" force which allows them to continue to their motion. The reason is that energy is conserved where friction is minimal.

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All three videos are about objects which moves without any loss of enegy(or very little). The friction on the objects are negligible so that objects will continue to its state until another force acts on them and changes the energy of the system.

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In all of the videos below there is a continious motion that is done by an object. If there is no another force applied to them they will continue to do their motions forever.

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In all of these videos there is a repeated motion. All of the objects take a route similiar to an arc of a circle.

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All three videos contain a continous motion. The things represented in the video use different kinds of force to keep its constant state; the World shown has a gravitional force, the metronome has a weight and newton's cradle uses physical impulse. The motion will continue until an external force is acted upon them.

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In all of the videos, the objects featured in the video have the ability to move forever after an initial external force has been applied to them. In order to stop them, an external force is required.

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Similarities of the videos is,somehow when they began to move,they keep moving.

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Similarities of the videos is,somehow when they began to move,they keep moving.

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In all of the videos the similarity is when the objects start to move, they continue to their action until an external force acts on them.

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In the videos, objects continue their motion until external force is applied.

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I think that the rotation of earth, metronome, and newton's cradle have some similarities among them. Once their motion has started, they continue to move forever. Besides this, I think that their motion includes circular motion. Earth rotates around itself, metronome's arm draws an arc in it's motion and newton's crandle consists of five spheres. Their motions are sort of a circular motion, and I think their motions are related with trigonometric functions.

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All of the videos have their own continuity.

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In all of the videos a motion is being done.

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The similarity in the videos is that they are all videos of periodic motions which I think can be reprsented by the use of trigonometric functions. Moreover, in all of the videos the motion of the object is continous until an external force is exerted on the object.

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Newton's Cradle

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Metronome Working

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A mechanical wind-up metronome working - in motion with different beats per minute selections. From Wikipedia: A metronome is any device that produces regular, metrical ticks (beats, clicks) - settable in beats per minute. These ticks represent a fixed, regular aural pulse; some metronomes also include synchronized visual motion (e.g.

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Rotation of Earth

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Test Animation of a simple Earth rotation at 4k