implemented projectile motion

Projectile_motion/projectile.jl

@@ -0,0 +1,54 @@
+using Plots
+
+#Getting the initial parameters
+println("Enter the angle in degrees: ")
+theta = readline()
+theta = parse(Float64,theta)
+#theta = 45
+theta = π*(theta/180)
+println("Give me an initial velocity: ")
+u = readline()
+u = parse(Float64,u)
+println("Give me the value of gravitational acceleration: ")
+#u = 12
+g = readline()
+g = parse(Float64,g)
+#g = 10
+
+#Formulas
+distance = (u^2)*sin(2*theta)/g
+time_of_flight = 2*u*(sin(theta)/g)
+Δt = time_of_flight/100
+
+#Creating time steps
+time_array = Float64[0.0]
+for i=1:100
+    push!(time_array,time_array[end]+Δt)
+end
+
+#printing values to verify
+println(time_array)
+println(length(time_array))
+println(time_of_flight)
+println(distance)
+
+x = Float64[]
+y = Float64[]
+for j = 1:101
+    push!(x, u*time_array[j]*cos(theta))
+    push!(y,u*sin(theta)*time_array[j] - (0.5*g*time_array[j]^2))
+end
+
+#Building the animation
+max_x = findmax(x)
+max_y = findmax(y)
+
+anim = Plots.Animation()
+for i = 1:1:length(x)
+    scatter(x[1:i],y[1:i],xlim = (0,max_x[1]+1), ylim = (0,max_y[1]+1),label = "position at a given time step",title = "Projectile_motion Trajectory_animation")
+    xlabel!("length(in meters)-->")
+    ylabel!("height(in meters)-->")
+    Plots.frame(anim)
+end 
+
+gif(anim, "trajectory.gif",fps = 30)