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# Why is it unwise to suddenly apply the brakes of a car on a wet or icy pavement? (Hint: What type of friction is acting between your tires and the

Why is it unwise to suddenly apply the brakes of a car on a wet or icy pavement? (Hint: What type of friction is acting between your tires and the roadway if your tires are sliding along the roadway? What if your tires are “rolling” along the roadway?).......
Explain why it is so important that the string that connects the block to the hanging masses must be parallel to the surface of the plane? Would the frictional force change if the string were not parallel? Explain why or why not.
3 Give a couple of everyday examples where a reduction in the force of friction would be undesirable.
4 What are some real life situations in which a person observes air resistance?
5 How would the results of your experiment change if the fluid through which the objects were dropped had been more viscous? How about if the object had the same dimensions but made heavier?

Why is it unwise to suddenly apply the brakes of a car on a wet or icy pavement? (Hint: What
type of friction is acting between your tires and the roadway if your tires are sliding along the...

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