องค์ประกอบของความเร็วในแนวราบของวัตถุจะไม่เปลี่ยนแปลงตลอดการเคลื่อนที่ และองค์ประกอบของความเร็วในแนวตั้งจะเพิ่มขึ้นแบบเชิงเส้นเพราะมีความเร่งเนื่องจากความโน้มถ่วงที่มีค่าคงที่ องค์ประกอบของความเร็วทั้งในทิศทาง x และ y สามารถรวมกันเพื่อแก้ปัญหาองค์ประกอบของความเร็ว ณ เวลา ได้ดังนี้
Trajectories of projectiles launched at different elevation angles but the same speed of 10 m/s in a vacuum and uniform downward gravity field of 10 m/s2. Points are at 0.05 s intervals and length of their tails is linearly proportional to their speed. t = time from launch, T = time of flight, R = range and H = highest point of trajectory (indicated with arrows).
Galileo Galilei, Two New Sciences ', Leiden, 1638, p.249
The คือ ความเร่งโน้มถ่วง. ( ที่ผิวโลก).
ตุลาคม 03, 2021
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rayathangkhxngkarekhluxnthiaebbophreckithlepn d v 0 t d cos 8 displaystyle d v 0 t d cos theta dngnn 3 d v 0 2 g sin 2 8 displaystyle d frac v 0 2 g sin 2 theta d displaystyle d camikhasungsudemux sin 2 8 1 displaystyle sin 2 theta 1 sungsxdkhlxngkb 2 8 90 displaystyle 2 theta 90 circ hrux 8 45 displaystyle theta 45 circ Trajectories of projectiles launched at different elevation angles but the same speed of 10 m s in a vacuum and uniform downward gravity field of 10 m s2 Points are at 0 05 s intervals and length of their tails is linearly proportional to their speed t time from launch T time of flight R range and H highest point of trajectory indicated with arrows rayathanginaenwrab d displaystyle d thiekhluxnthiid d v cos 8 g v sin 8 v sin 8 2 2 g y 0 displaystyle d frac v cos theta g left v sin theta sqrt v sin theta 2 2gy 0 right emuxphuneriyb khwamsungerimtn y 0 0 displaystyle y 0 0 rayathangthiekhluxnthiid d v 2 sin 2 8 g displaystyle d frac v 2 sin 2 theta g 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