When a moving car encounters a patch of ice the brakes are applied. Why is it desirable to keep the wheels rolling on the ice without locking up?
Answers
Answer:
Objects sitting in a fluid (liquid or gas) experience a pressure on every surface, equal to the pressure of the fluid. ... If the object is less dense than the fluid, its own weight is therefore smaller than the buoyancy force upwards, and it floats.This is because the weight of the liquid displaced by the object is greater than the weight of the object (since the liquid is denser). As a result, the object cannot remain completely submerged and it floats. The scientific name for this phenomenon is Archimedes Principle.
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Explanation:
Answer:
Friction exists if the wheels keep rolling on the ice without locking up, resulting in maximumm braking force. However, if the wheels lock up then kinetic friction takes over since there is relative slipping between wheel andice. This reduces the braking force and the car takes longer to stop.