KINESOLV-LOW.py

# Created by Rohan Reddy
# Updated by Spencer Boggs

#Version with the lowest RAM usage

import math
print("")
print("      Welcome to Kinematic")
print("        Equation Solver!")
print("     Created by Rohan Reddy")
print("    Updated by Spencer Boggs")
print("")
print(" Enter any unknown value as u")
print(" Ensure velocities are in m/s,")
print(" acceleration is in m/s^2, time")
print(" is in s, and distance is in m")
print("")
input("    Press [Enter] to Start")
while True:
    print("")
    Vfinal = input("Enter Vfinal (v): ")
    Vinitial = input("Enter Vinitial (v0): ")
    acceleration = input("Enter acceleration (a): ")
    time = input("Enter time (t): ")
    deltaX = input("Enter displacement (x-x0): ")
    print("Enter variable to solve for. ")
    solveFor = input("(v, v0, a, t, x): ")

    #V = v0 + at
    #Requires v0, a, t
    if (solveFor == "v") and (Vinitial != "u") and (acceleration != "u") and (time != "u"):
        Vfinal = float(Vinitial) + (float(acceleration) * float(time))
        print("")
        print("v = " + str(Vfinal) + "m/s")
        print("Equation: v = v0 + at")

    #Requires v, a, t
    elif (solveFor == "v0") and (Vfinal != "u") and (acceleration != "u") and (time != "u"):
        Vinitial = float(Vfinal) - (float(acceleration) * float(time))
        print("")
        print("v0 = " + str(Vinitial) + "m/s")
        print("Equation: v = v0 + at")

    #Requires v0, v, t
    elif (solveFor == "a") and (Vfinal != "u") and (Vinitial != "u") and (time != "u"):
        acceleration = (float(Vfinal) - float(Vinitial)) / float(time)
        print("")
        print("a = " + str(acceleration) + "m/s^2")
        print("Equation: v = v0 + at")

    #Requires v0, v, a
    elif (solveFor == "t") and (Vfinal != "u") and (Vinitial != "u") and (acceleration != "u"):
        time = (float(Vfinal) - float(Vinitial)) / float(acceleration)
        print("")
        print("t = " + str(time)+ "s")
        print("Equation: v = v0 + at")

    #V^2 = v0^2 + 2ax
    #Requires v0, a, x
    elif (solveFor == "v") and (Vinitial != "u") and (acceleration != "u") and (deltaX != "u"):
        Vfinal = math.sqrt(abs(float(Vinitial)**2 + 2 * float(acceleration) * float(deltaX)))
        print("")
        print("v = " + str(Vfinal) + "m/s")
        print("Equation: V^2 = v0^2 + 2ax")

    #Requires v0, v, a
    elif (solveFor == "x") and (Vinitial != "u") and (acceleration != "u") and (Vfinal  != "u"):
        deltaX = (float(Vfinal)**2 - float(Vinitial)**2) / (2 * float(acceleration))
        print("")
        print("x = " + str(deltaX)+ "m")
        print("Equation: V^2 = v0^2 + 2ax")

    #Requires v, a, x
    elif (solveFor == "v0") and (deltaX != "u") and (acceleration != "u") and (Vfinal  != "u"):
        Vinitial = math.sqrt(abs(float(Vfinal)**2 - (2 * float(acceleration) * float(deltaX))))
        print("")
        print("v0 = " + str(Vinitial) + "m/s")
        print("Equation: V^2 = v0^2 + 2ax")

    #Requires v, v0, deltaX
    elif (solveFor == "a") and (deltaX != "u") and (Vinitial != "u") and (Vfinal  != "u"):
        acceleration = (float(Vfinal)**2 - float(Vinitial)**2) / (2 * float(deltaX))
        print("")
        print("a = " + str(acceleration)+ "m/s^2")
        print("Equation: V^2 = v0^2 + 2ax")


    #x = v0t + 1/2 * at^2
    #Requires v0, t, a
    elif (solveFor == "x") and (Vinitial != "u") and (acceleration != "u") and (time != "u"):
        deltaX = float(Vinitial) * float(time) + (0.5 * float(acceleration) * float(time)**2)
        print("")
        print("x = " + str(deltaX) + "m")
        print("Equation: x = v0t + 1/2 * at^2")

    #Requires x, v0, t
    elif (solveFor == "a") and (Vinitial != "u") and (deltaX != "u") and (time != "u"):
        acceleration = (float(deltaX) - float(Vinitial) * float(time)) / (0.5 * float(time)**2)
        print("")
        print("a = " + str(acceleration)+ "m/s^2")
        print("Equation: x = v0t + 1/2 * at^2")

    #Requires x, a, t
    elif (solveFor == "v0") and (acceleration != "u") and (deltaX != "u") and (time != "u"):
        Vinitial = (float(deltaX) - 0.5 * float(acceleration) * float(time)**2) / float(time)
        print("")
        print("v0 = " + str(Vinitial) + "m/s")
        print("Equation: x = v0t + 1/2 * at^2")

    #Requires a, v0, x
    elif (solveFor == "t") and (acceleration != "u") and (deltaX != "u") and (Vinitial != "u"):
        a = 0.5 * float(acceleration)
        b = float(Vinitial)
        c = float(deltaX) * -1
        if ((-b + math.sqrt(abs(b**2 - 4 * a * c)))/(2*a)) < 0:
            time = ((-b - math.sqrt(abs(b**2 - 4 * a * c)))/(2*a))
        else:
            time = (-b + math.sqrt(abs(b**2 - 4 * a * c)))/(2*a)
        print("")
        print("t = " + str(time)+ "s")
        print("Equation: x = v0t + 1/2 * at^2")


    else:
        print("Unsolvable.")
        print("Double check your inputs.")