Law 1 - Where do you think a sprinter expends the most energy during a 100m dash: 1. At the beginning of the race. 2. The last quarter of the race. 3. After crossing the finish line? Law 2 - In tennis - the force Serena Williams hits a ball with her racquet would be much greater than when you or I hit a ball using the same racquet because we are generating a smaller force - this example highlights magnitude. If we were playing baseball and wanted to highlight the second part of this law (mass) let's compare if we hit a baseball versus a basketball? Which ball would accelerate faster and why? Law 3 - Where doe a volleyball player who is preparing to jump up for a block get there "equal and opposite reaction" from? 1. The net 2. The floor 3. Their legs