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arlik [135]
3 years ago
10

Free fall reaches 216km per hour. What is rate in meters per second.? How many meters fall during 20 seconds free fall?

Mathematics
1 answer:
lakkis [162]3 years ago
4 0

Given,

Rate of free fall = 216 km/h

Solution,

km/h to m/s is converted as follows :

216\ \dfrac{km}{h}=216\times \dfrac{1000\ m}{3600\ s}\\\\=60\ m/s

So, the rate of fall is 60 m/s.

If t = 20 s

Assume, initial velocity = 0

It will move under the action of gravity.

Using equation of motion,

h=ut+\dfrac{1}{2}gt^2\\\\h=0+\dfrac{1}{2}\times 10\times 20^2\\\\h=2000\ m

Hence, this is all for the solution.

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What is the answer in simplest term?
Burka [1]

Answer:

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--------------

2x

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8 0
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so the sum is S=\frac{100(1+100)}{2}
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fun fact, gauss (famous math guy) did this when he was younger, legend has it that he was assigned this as an in class assigment to kill time but gauss found a neat pattern, he noticed that adding the end terms wer giving the same sum, example, 100+1=101, 2+99=101, etc, so he just needed to find al the pairs and add them all up




answer is 505
the result is 505
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