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Q. A person discovers that the 5 ampere fuse in his car's brake light circuit is blown. Not having a spare 5 ampere fuse available, he replaces it with a new 10 ampere fuse. What is likely to happen as he uses the brakes?

Q. A 4.5 box slides down a 4.7- -high frictionless hill, starting from rest, across a 1.6- -wide horizontal surface, then hits a horizontal spring with spring constant 550 . The other end of the spring is anchored against a wall. The ground under the spring is frictionless, but the 1.6--long horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.26.

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