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Q. A simple pendulum of length 2.60 makes 9 complete swings in 28.8.What is the acceleration of gravity at the location of pendulum?

Q. A motorist travelling at 10 m/s encounters a deer in road 39 m ahead.

If the highest acceleration the vehicle's brakes are capable of is -5 m/s2, what is the maximum reaction time of motorist that will allow her or him to keep away from hitting the deer?

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