Views: 4 Author: Site Editor Publish Time: 2021-06-22 Origin: Site
Bright and moving things always attract the attention of children, just like windmills, which are their fun. But the children did not realize that everything contained the scientific mysteries. Today, alpha science classroom teaches children How to Make Self Retracting Pinwheel from Popsicle Sticks, to cultivate children 's hands-on ability and logical thinking ability through interesting kid' s science experimental activities, Let children gain knowledge of physical science experiments in the process of entertainment.
Alpha science classroom：Make Self Retracting Pinwheel from Popsicle Sticks Things Needed
A Plastic Bottle – transparent.
A Skewer – length a little more than the bottle, breadth the size of the screw you are about to select.
A Small stick – one-third the length of the skewer taken.
Glue – should be a strong adhesive.
Heat source – candle/lighter.
Thread – strong enough to tolerate continuous force applied to it – thrice the length of the bottle taken.
A pair of scissors – to cut the thread.
A Marker – should be of a darker color than the Popsicle sticks.
A Screwdriver – to burn holes.
A Screw – to make holes.
Alpha Science Class: How to make a self retracting pinwheel with popsicle sticks
Step 1: children take 2 Popsicle sticks and mark them accurately on the center of the Popsicle sticks with a black marker. Then use the screw to make a hole at the marked point, hold the tip of the screw at the marked point, and then push the head of the screw with your thumb. Repeat this operation over and over again, there will be a hole in the Popsicle stick.
Step 2: children apply glue on these marked points, and then place the Popsicle sticks on top of the other in a crosswise manner, so that their holes coincide. Before the glue dries, quickly pass the fork through the coincident holes. The cross of the Popsicle stick should be fixed to one end of the skewer.
Step 3: The children prepare the bottle: Punch three holes on the top and mark the three places of the bottle with a dark marker, first, in the center of the bottle cap, and second, in the center of the bottle body, and the center of the bottle bottom , Pick up a screwdriver, and heat its tip with a candle or lighter. While applying pressure, pass the hot tip of the screwdriver through the three marked holes. A hot screwdriver melts the plastic, thus forming a hole.
Step 4: The children put the ice cream stick cross-connecting device into the three-hole bottle, pick up the small stick, tie one end of the thread in the middle, and tie it into a tight double knot. The knot should be tight enough not to deviate from the center of the small stick, then open the bottle, pass the other end of the small tie through the hole in the middle of the bottle, and then pull it out of the bottle mouth. Take the lid, go through the lid hole, and string the other end of the ice cream stick across its length until the lid is behind the ice cream stick.
Tie the other end of the loose thread coming out of the bottle mouth to one-third of the length of the ice cream stick, and cross it into a tight double knot.
The knot should be tight enough not to shift from the third point.
Step 5: children put the ice cream sticks with lids in cross-strings from the mouth of the bottle. The method should make the cross part of the ice cream stick face the mouth and tail of the bottle, and the other part faces the bottom hole of the bottle, closing the mouth of the bottle.
Step 6: The children hold the extra length of the kebab protruding from the hole in the base and rotate the kebab clockwise. This is the thread attached to it that is wound around one-third of the point. Continue to rotate it until the entire loose string is wrapped around the fork inside the bottle, and a small stick attached to the other end of the string restricts any further rotation.
Now, let us implement Retracting Pinwheel together. children's sticks acted as handles. Pull the handle fully to untie the thread completely. Let go of the handle. Once the handle is released, the skewer will automatically retract and wind the thread back to itself counterclockwise.
The ice cream sticks-cross attached at the bottle mouth end of the skewer mirrors the motion attached to it.
Hence, this is how the motion of the pinwheel comes about on the application of external force by the handle.
Alpha Science Classroom: Science Behind the Self Retracting Pinwheel
The Alpha Science class tells children that the scientific background of how a windmill works involve force and movement.
The concepts of force, principle, restoring force, Newtonian theory of motion, and angular momentum allow people to better understand the work of a self-contracting windmill.
In order to better understand the whole work, alpha science classroom interprets it as two systems:
1. Small stick/handle and rope
This system is suitable for other motion calculation methods proposed by Newton. According to the first motion algorithm, a stationary solid matter can only move when an external force is applied.
In a self-contracting windmill, the pulling action is a small stick with a handle. This pulling force is the external force exerted in this situation.
The pulling force leads to the development of the linear velocity of the score on the skewer.
The speed line here is the speed at which the kebab rewinds. This is when the second technique of sports comes into play.
The force applied is equal to the product of the mass of that particular item and the cooking.
When the windmill is retracted, the speed of the wire movement is automatically the force and mass of the small rod (ie, the handle).
The first and third actions prove that this is an obvious and opposite reaction, and toughness can indeed prove it.
When the pulling force is attached to the rope, it does exert an external force; and this action restores balance and instantaneous balance.
This restoring force pulls the handle back to its original position and maintains the exercise technique.
2. Skewers and activity sticks-Cross
Kebab and game corner bar crossing systems work based on angular momentum. Momentum is related to inertia and angular velocity.
When the handle is pulled to rotate the kebab, this movement causes the movable rod to rotate.
Due to this pulling force, the moment of inertia and angular momentum are introduced into the system. The angular quantity has inherent conservation characteristics, and energy is emitted outwards (the force of rotational motion is the compression system).
Therefore, when an external force is applied in the form of a string, the moving rod is now a product of rotating sound.
Inertia and angle.
To balance this, there is no change, and an increase in each angular velocity is observed. This increased speed causes the movement to rotate or simply rotate.
Corollary To sum up, when the generating force is generated, everything returns to normal. The force from angular velocity to recovery keeps the angular momentum in the first system constant.
All systems are in a static state, and the entire Self Retracting Pinwheel system is not affected by external forces.
Is the automatic windmill very interesting? Today, alpha science classroom 's How to Make Self Retracting Pinwheel from Popsicle Sticks,, this interesting kid' s science experiment activity is over, hope this interesting physical science experiment, hope to help children learn fun physics, while enjoy the fun of science, children go to make it and become the most powerful physics scientists.