Question

help me with this please​

Answer 1

Answer:

can you please make it clear what is to be find ??

Answer 2

$\sf \colorbox{gold} {\red(ANSWER ᵇʸ ⁿᵃʷᵃᵇ⁰⁰⁰⁸}$

Let’s see.

$80 \frac{km}{h}$

is about

$22 \frac{m}{s}$

Average reaction time for a driver is something between

$\frac{1}{2}$

and 1 seconds. So the distance travelled before brake is applied is between 11 to 22 meters. Let us say, that it is 1 second, for now.

If we assume that the road is of dry asphalt and the car is of average make and model with good tyres, we could say the deacceleration is about

$9 \frac{m}{s^2}$

. So after 2 seconds the speed is about

$13 \frac{m}{s}$

and the car has travelled about 39,5 meters. A second later, the speed has dropped to

$4 \frac{m}{s}$

and car has travelled about 45 meters.

Little less than half second later, the car has stopped to standstill, after travelling about 1 meter more, 8 meters from the fallen tree.

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I hope you have helped with this answer.

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