In a women's 100 -m race, accelerating uniformly, Laura takes 3.00 s and Healan 4.00 s to attain their maximum speeds, which they each maintain for the rest of the race. They cross the finish line simultancously, both setting a world record of 10.5 s. (a) What is the acceleration of cach sprinter? (b) What are their respective maximum speeds? (c) Which sprinter is ahead at the 6.00 -s mark, and by how much? (d) What is the maximum distance by which Healan is behind Laura, and at what time does that occur?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.