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Projectile motion - height according to horizontal travel distance

ÀÛ¼ºÀÚ Uploader : jubjup ÀÛ¼ºÀÏ Upload Date: 2023-07-11º¯°æÀÏ Update Date: 2023-07-11Á¶È¸¼ö View : 84

As shown in the figure, for a projectile launched from a specific height y0 at an initial speed V (m/s) at an angle of ¥è (¢ª) with the horizontal, obtain the height yx (m) according to the horizontal travel distance x (m).


horizontal travel distance over time

x = V*cos(¥è)*t ¡æ t = x/(V*cos(¥è))

height over time

y = Ht = y0 + V*sin(¥è)*t - (1/2)*g*t^2

Substituting t = x/(V*cos(¥è)),

yx = y0 + V*sin(¥è)*(x/(V*cos(¥è))) - (1/2)*g*(x/(V*cos(¥è)))^2

yx = y0 + x*tan(¥è) - (1/2)*g*(x/(V*cos(¥è)))^2

 = -g/(2*(V*cos(¥è))^2)*x^2 + tan(¥è)*x + y0



*** Âü°í¹®Çå[References] ***

yx = -g/(2*(V*cos(¥è))^2)*x^2 + tan(¥è)*x + y0
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