# Anna and Leon experiment with lever, pulley and magnet

Lever, pulley and magnet – there is something moving !
This kit revolves around the forces which children come across in their daily lives. They will be surprised to discover where a lever is hidden and where a pulley turns round forces. Especially attractive for children are the effects of magnetic force.
With the materials they can detect the forces of lever, pulley and magnet.
Exciting, curricula-based experiments will enable the children to explore phenomena in environment and technics. Their interest in natural sciences will be wakened and encouraged.
The experiments are fail-safe and easy to reproduce. The robust materials are compactly stowed in a plastic tray with lid.

Art. no. 85025

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experiments
• 1 - Everything has its weight

### experiment "Everything has its weight"

The children should be introduced to the following knowledge with the help of the experiment:
- The weight of a body depends on its size and the material it is made of.
- All bodies heavier than air fall down when released from a height.
- All bodies fall to earth at the same rate, regardless of their weight. Because of different shapes and surfaces, they are slowed down by air resistance.
- The force with which a body hits the ground depends on its weight.

• 2 - At equilibrium

### experiment "At equilibrium"

The children should be introduced to the following knowledge with the help of the experiment:
- If an object or body remains still or lying in its position, it is in equilibrium.
- Balance depends on the center of gravity of a body.
- By balancing, you can bring a body back into equilibrium.

• 3 - What is heavier ?

### experiment "What is heavier ?"

The children should be introduced to the following knowledge with the help of the experiment:
- All bodies have a weight or exert a weight force.
- The mass of the body is decisive for the weight force.
- Bodies that have the same size and shape can exert a different weight force due to their mass. Thus, a small body can also be heavier than a larger one of different material.

• 4 - A lever can help

### experiment "A lever can help"

The children should be introduced to the following knowledge with the help of the experiment:
- Many practical devices and tools in our everyday lives are based on leverage.
- Levers are simple machines that can be used to lift large weights with a small force.
- The effect of a lever depends on the position of the pivot point.

• 5 - Up and down on the seesaw

### experiment "Up and down on the seesaw"

The children should be introduced to the following knowledge with the help of the experiment:
- Many practical devices and tools in everyday life are based on leverage.
- The effect of the force applied depends on the length of the lever arm and the load to be lifted.
- It depends on the weight and its distance from the pivot point whether the lever is in equilibrium.

• 6 - Make it easier with a pulley

### experiment "Make it easier with a pulley"

The children should be introduced to the following knowledge with the help of the experiment:
- Simple machines can be used, for example, to direct the effect of a force in a different direction.
- Loads can be moved upwards more easily with the help of a pulley.
- However, no force can be saved in the process; the pulling force must be just as great as the weight of the load.
- With a pulley block, force can be saved because the principle of force times distance is used here.

• 7 - Everything is spinning around !

### experiment "Everything is spinning around !"

The children should be introduced to the following knowledge with the help of the experiment:
- A rotary motion can be transferred to another location with the aid of a chain or belt.
- It is possible to convert a smaller number of revolutions into a larger one.
- The amount of force required is correspondingly greater or less.

• 8 - Who is pulling the brake?

### experiment "Who is pulling the brake?"

The children should be introduced to the following knowledge with the help of the experiment:
- If two surfaces rub against each other, a braking effect is created by friction.
- How strong the friction and thus the braking effect is depends on the type of surface and the strength of the pressure on the surface.
- The braking effect can be increased or decreased by the nature of the surface.

• 9 - I want to stay this way !

### experiment "I want to stay this way !"

The children should be introduced to the following knowledge with the help of the experiment:
- In these experiments, the children learn about the phenomenon of inertia of bodies.
- Solid bodies are at rest in the place where they are.
- If a body is to move, force must be applied to bring it out of its resting position.
- Bodies are inert, meaning they want to maintain the state they are in. They either want to remain stationary or continue moving when they are in motion.

• 10 - It’s your turn !

### experiment "It’s your turn !"

The children should be introduced to the following knowledge with the help of the experiment:
- Energy can be transferred by an impulse.
- Bodies can be in a state of rest or in a state of motion.
- If a body that is in motion meets a body that is at rest, the latter can also be set in motion.
- When meeting, a large part of the energy with which the body is moving is passed on to the body at rest.

• 11 - Who is pulling me?

### experiment "Who is pulling me?"

The children should be introduced to the following knowledge with the help of the experiment:
- Forces act on bodies that are set in a rotating motion.
- One of these forces is the so-called centrifugal force, which, for example, drives the gondolas of a chain carousel outward.

• 12 - Quite elastic !

### experiment "Quite elastic !"

The children should be introduced to the following knowledge with the help of the experiment:
- Elastic materials and bodies can change their shape.
- A force is required to change the shape.
- When the force is no longer applied, the original shape is resumed; this is referred to as elasticity.

• 13 - Magnetic force

### experiment "Magnetic force"

The children should be introduced to the following findings with the help of the experiment:
- Magnets exert an attractive force on certain materials.
- There are objects that are attracted and objects that are not.
- The attractive force of a magnet also acts through objects, but only to a limited extent.

• 14 - Quite strong such a magnet !

### experiment "Quite strong such a magnet !"

The children should be introduced to the following findings with the help of the experiment:
- The attractive force of a magnet also acts through objects, but only to a limited extent.
- The magnet does not have to touch the objects to exert its force on them.
- Metals that react to the magnetic force can themselves be made magnetic for a short time, this is called magnetization.

• 15 - Come here, go away !

### experiment "Come here, go away !"

The children should be introduced to the following findings with the help of the experiment:
- Magnets have different poles, a north pole and a south pole.
- Equal poles repel each other.

scope of supply
• 1 × Paperclip
• 2 × Plastic beaker, 125 ml, with scale
• 1 × Balance stands, plastic
• 1 × Balance beam, yellow
• 2 × Scale plan, yellow, with bows
• 2 × Seesaw
• 1 × Triangular bridges
• 1 × Magnet rod ALCOMAX
• 1 × Pulley, unmounted, 28 mm dia.
• 2 × Pulley, unmounted, 58 mm dia.
• 1 × Masses with double hook, 50 g, 10 pcs.
• 1 × Masses with double hook, 25 g, 10 pcs.
• 2 × Plastic ball, PP, 25 mm Ø
• 2 × Plastic ball, POM, 25 mm Ø
• 10 × Wooden ball, 25 mm Ø
• 1 × Carriage
• 1 × Balloons with reinforced surface tension
• 1 × Cord, demonstration, 1 mm dia.
• 1 × Magnet bar with central hole
• 4 × Clamp socket, 10 mm
• 2 × Metal axle, 125 mm
• 1 × CD
• 1 × Rubber rings
• 1 × Suction cup hook
• 1 × Valve support
• 3 × Plastic box, 105/90/50 mm
• 1 × Tray, deep, red
• 1 × Lid