1)A fisherman has caught a very large, 5.0 kg fish from a dock that is 2.0 m abo
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Question
1)A fisherman has caught a very large, 5.0 kg fish from a dock that is 2.0 m above the water. He is using lightweight fishing line that will break under a tension of 57 N or more. He is eager to get the fish to the dock in the shortest possible time.
a)If the fish is at rest at the water's surface, what's the least amount of time in which the fisherman can raise the fish to the dock without losing it?
2)It's possible for a determined group of people to pull an aircraft. Drag is negligible at low speeds, and the only force impeding motion is the rolling friction of the rubber tires on the concrete runway. In 2000, a team of 60 British police officers set a world record by pulling a Boeing 747, with a mass of 200,000 kg, a distance of 100 m in 53 s. The plane started at rest. Suppose that ?r=0.02.
Estimate the force with which each officer pulled on the plane, assuming constant pulling force and constant acceleration.
Explanation / Answer
the vertical component of her acceleration during the landing was==9.8m/s^2
her speed as her feet left the force plate_was==9.8*0.20 = 1.96m/s
high she jump was = v^2 / 2a =19.6cm
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