Final answer:
To execute a left turn, first signal your intentions early and get into the correct lane, then ensure the intersection is clear before proceeding with the turn, obeying traffic laws and considering the effects of inertia and centripetal force.
Step-by-step explanation:
To safely and legally make a left turn, you should use the following techniques:
First, ensure that you are in the correct lane for making a left turn, typically the leftmost lane. Prior to reaching the intersection, activate your turn signal to alert other drivers of your intention to turn. This gives other drivers and pedestrians ample time to anticipate your actions and react accordingly. Second, before initiating the turn, reduce your speed and scan the intersection for any oncoming traffic, pedestrians, or other obstacles.
Only proceed with the turn when you have the legal right of way and it is safe to do so. During the turn, maintain a steady speed and follow the curvature of the road, ensuring not to cut corners which can endanger oncoming traffic. While performing these maneuvers, it's important to remember physics concepts such as inertia and the effects of acceleration and deceleration.