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Force
แรง
F
แรงและเครื่องมือวัดแรงเบื้องต้น
อุปกรณ์
1.ตาชั่งสปริง
2.มวลถ่วงขนาด 500
กรัม และ 100 กรัม
นักเรียน 1 คนออกมาสาธิตการวัดแรง
ของวัตถุ
แรงเป็นสิ่งที่ทำให้วัตถุเปลี่ยนรูปร่ำง เปลี่ยนทิศทำง
เกิดกำรเคลื่อนที่หรือหยุดนิ่งได้แรงสำมำรถเปลี่ยน
ควำมเร็วของวัตถุได้หรือกล่ำวได้ว่ำแรงทำให้วัตถุ
เกิดควำมเร่ง
N
F
W
f
F2
F1
F3
F6
F4
F5
การทดลองเรื่องแรงและแรงดันอากาศ
อุปกรณ์
1.ภาชนะทรงกระบอกใส
2.กลีเซอรอล
3.หลอดฉีดยา
4.สายยาง
คำถำม
ฟองอากาศที่มี่ขนาดใหญ่ ขนาดเล็ก อันไหนจะเคลื่อนที่ขึ้นได้เร็ว
กว่ากัน ?
Large =
Small =
Equal =
เขียนแนวแรงที่กระทาต่อฟองอากาศพร้อมทั้งอธิบายมาพอสังเขป
homework
ให้นักเรียนดู sci show ต่อไปนี้แล้วให้เขียนแนวแรงที่กระทาต่อตะปู ทั้งสองข้าง
และศึกษาจุดศูนย์ถ่วง พร้อมทั้งอธิบายมาพอสังเขป ส่งครูในคาบถัดไป

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