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1) A rock is dropped from a cliff with a height of 200 m. With what velocity will the rock hit the ground

could anyone help explain

1 A Rock Is Dropped From A Cliff With A Height Of 200 M With What Velocity Will The Rock Hit The Ground Could Anyone Help Explain class=

Sagot :

InTheShadows

A rock is dropped from a 200 m high cliff. How long does it take to fall (a) the first 100 m and (b) the last 50 m?

The basic equation you want is:

s=at22

Solving for t:

t=2sa−−−√

We’ll assume a=9.8 , so 2a−−√=14.9−−−√≈0.4518

So, for (a)s=100 , so t=0.4518100−−−√=4.518

The total time is 0.4518200−−−√≈6.389

The time to fall 150 m is 0.4518150−−−√≈5.533

So the time to fall the last 50 m is 6.389 - 5.533 = 0.856 seconds

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juliet2209
The answer is in the attachment below:
View image juliet2209
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