Name: KX1933 seesaw
Item no: KX1933 
Size: 260 * 60 * 80 mm
Weight: about 80g
Material: wood + hardware accessories + plastic accessories + wood glue
Color: wood
Battery use: no
Packing: 500 PCS
Rules: 600 * 450 * 550 mm


Seesaw, a children's toy with more than two participants. Sit on the seesaw, one person sits at one end, one person goes up, one person comes down. Seesaw is a kind of fitness sports; Its interest is strong deeply the Korean nationality and the Russian nationality and so on minority nationality compatriot's affection.

1 folk sports

In folk, pressure warped plate is a kind of fitness sports project; Its interest is strong deeply the Korean nationality and the Russian nationality and so on minority nationality compatriot's affection


2 the principle of

The principle of seesaw is to use the lever principle. The pressure on the seesaw is power and resistance. The distance from the fixed point of the seesaw is moment arm.
The acceleration of gravity causes one to rise and one to fall. The acceleration of gravity of the higher one is greater than that of the lower one, so the higher one falls, and at the same time, the lower one is lifted up by the lever principle, and so on.

3 a riddle

A seesaw

with



A seesaw

with



3. Seesaw

I. teaching objectives

1. The balance of lever scale can be interpreted hypothetically through observation, experience and use of existing knowledge and experience. Can know the balance rule of lever ruler through observation and experiment.

2. Be good at discovering and raising problems in the game; Concerned about people using the lever balance principle of the technical achievements; Willing to cooperate and exchange; Willing to use the knowledge learned to improve life. (moral education objectives)

3. Know the equilibrium condition of lever rule; Learn about balance in your life.

Ii. Teaching preparation

According to the direction of inquiry given in the textbook, students are encouraged to play seesaw before class and prepare relevant materials for exploration, such as bracket, lever ruler, ruler, hook code, candle, etc. According to the teaching design, teachers should prepare other exploration materials for students, such as designing forms and making multimedia courseware.

Iii. Teaching process

I. recall and exchange the process of playing \"seesaw\" and the interesting phenomena found. By mobilizing students' original experience,Seesaw teaching design lesson plan _

Second, explore how to balance the lever ruler. Organize students to study equilibrium with a lever scale.

1. Put forward activity direction: \"combine oneself life experience to guess, how can make lever ruler maintain balance?\"

2. Student prediction.

3. Discuss in groups and develop research plans.

4. Conduct exploratory experiments.

5. Communicate experimental results and findings.

6. Summarize the rule of balance of lever ruler.

3. Communicate about balance in your life.



Four, free activity: play \"candle seesaw\", and say the truth.

Expansion activity: let's make a small toy similar to a seesaw.

Vi. Expansion activities:

1. Make a small toy that looks like a seesaw

2. After class, investigate what other balance phenomena exist in your life. Talk to me next time.

Teaching reflection:

In this lesson, lead the students from the life experience, recall the experience when playing seesaw, and with seesaw teaching design lesson plan _