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Alina [70]
3 years ago
6

Hi! Can you help me? A rock is dropped off a tall building and takes 4 seconds to hit the ground. How fast was it going? Using y

our last answer, how tall was the building? Thanks! :)
Physics
1 answer:
AURORKA [14]3 years ago
4 0
<span><span>Free fall distance h=<span /></span></span>78.4532 m<span><span><span>
</span></span><span>Free fall velocity v=</span></span>39.2266 m/s<span><span><span>
</span></span><span>= </span></span>141.21576 km/h<span><span><span>
</span></span></span>
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Answer:

Explanation:

Let after time t , Tina catches up David .

Distance travelled by them are equal ,

Distance travelled by Tina

s = ut + 1/2 a t²

= .5 x 2.10 t²

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Distance travelled by David

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t = 28.57 s

Distance travelled by Tina

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vekshin1

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In the given question, the force given to the steering wheel is 50 N.

The output force produced by the steering wheel is 3750 N.

Hence the mechanical advantage will be-

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Answer:

i speak english not spanigh sorry :(

Explanation:

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