Not quite working as intended...

    def setDesiredVelocity(self, desiredVelocity):
        self.desiredVelocity = desiredVelocity

    def update(self, bounds):
        self.modifyAcceleration()
        self.velocity = Vector.vecadd(self.velocity, self.acceleration)
        # self.rotation += self.angularMomentum
        self.move(bounds)

    # Ft = m(v - u)
    def modifyAcceleration(self):
        force = Vector.vecsub(self.desiredVelocity, self.velocity)
        force = [force[0]*self.mass, force[1]*self.mass]
        self.applyForce(force)

    def applyForce(self, force):
        magnitude = Vector.magnitude(force)
        if magnitude > self.maxMagnitude:
            force = [force[0]/magnitude*self.maxMagnitude, force[1]/magnitude*self.maxMagnitude]
        accel = [force[0]/self.mass, force[1]/self.mass]
        self.acceleration = Vector.vecadd(self.acceleration, accel)

    def move(self, bounds):
        self.position = Vector.vecadd(self.position, self.velocity)
        self.clamp(bounds)

    def clamp(self, bounds):
        if bounds.contains(self.rect) == False:
            self.rect.clamp_ip(bounds)
            self.position = self.rect.center