Create file1_Total area of cross section A.py

1 files changed, 31 insertions, 0 deletions

diff --git a/FSF-2020/approximations-and-optimizations/Critical-Points/file1_Total area of cross section A.py b/FSF-2020/approximations-and-optimizations/Critical-Points/file1_Total area of cross section A.py
new file mode 100644
index 0000000..b1ce29c
--- /dev/null
+++ b/FSF-2020/approximations-and-optimizations/Critical-Points/file1_Total area of cross section A.py
@@ -0,0 +1,31 @@
+from manimlib.imports import*
+
+class MotivationAnimation(Scene):
+    def construct(self):
+        
+        r = Rectangle(height = 7,breadth = 2,color = BLUE, fill_opacity = 0.3).scale(0.6) #----metal strip
+        b = Brace(r,UP)
+        r_text = TextMobject("$x$ metres",color = YELLOW).shift(3*UP)
+        m_text = TextMobject("Metal Strip").shift(3*DOWN)
+        a = Arc(radius=2).rotate(1).shift(LEFT+0.5*UP)
+        a2 = Arc(radius=2).rotate(5).shift(0.7*LEFT+0.9*UP).scale(0.2)
+        START = [1,0,0]
+        END = [0,3,0]
+        l = Line(START,END,color = RED).shift(0.9*DOWN)
+        a2_text = TextMobject("$\\theta$",color = PINK).shift(1.6*UP+0.4*RIGHT)
+
+        group1 = VGroup(r_text,b,a,l,a2,a2_text)
+        f_text = TextMobject("$A = f(x,\\theta)$").shift(2*DOWN)
+
+        ring = Annulus(inner_radius = 0.7, outer_radius = 1, color = BLUE)  #--bent metal strip
+
+        self.play(Write(r))
+        self.wait(1)
+        self.play(ShowCreation(m_text))
+        self.wait(1)
+        self.play(Write(group1))
+        self.wait(2)
+        self.play(FadeOut(group1))
+        self.wait(1)
+        self.play(ReplacementTransform(r,ring),ShowCreation(f_text))
+