from visual import *
track = box(pos=vector(0,-.075, 0), size=(1.0, 0.05, .10))
cart = sphere(pos=vector(-0.5,0,0), radius=0.05, color=color.green)
cart.m = 0.80
cart.p = cart.m*vector(0.5, 0, 0)

deltat = 0.01
t = 0

scene.autoscale=0

#(1) Calculate how far the cart will move in one time step (one execution of the loop). 0.5*0.01=0.005 m
#(2) How many executions of the loop will it take for the cart to move one meter?  200
#(3) What will the time t be after moving one meter? 1m/(0.5 m/s) = 2 s

cart.p = cart.m*vector(0.7, 0.1, 0)

while t<3.0:
    t = t + deltat
    rate(100)
    cart.pos = cart.pos + (cart.p/cart.m)*deltat

#(4) Write the force vector that points to the left (the -x direction) with a magnitude of 0.4 N.: <-0.4, 0,0>N

    Fnet = vector(-0.4, 0, 0)
    cart.p = cart.p + Fnet*deltat
    print 't=', t, 'cart.p=', cart.p