Скачать или смотреть The hammer and the feather When Apollo 15 astronaut David Scott dropped a hammer and a feather on t…

The hammer and the feather When Apollo 15 astronaut David Scott dropped a hammer and a feather on the moon to demonstrate that in a vacuum all bodies fall with the same (constant) acceleration, he dropped them from about 4 ft above the ground. The television footage of the event shows the hammer and the feather falling more slowly than on Earth, where, in a vacuum, they would have taken only half a second to fall the 4 ft. How long did it take the hammer and feather to fall 4 ft on the moon? To find out, solve the following initial value problem for s as a function of t . Then find the value of t that makes s equal to 0 .
[ Differential equation: amp; d^2 s/d t^2=-5.2 ft / sec^2; Initial conditions: amp; d s/d t=0 and s=4 when t=0 ]


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