Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.8 m/s2 for 3.3 seconds. It then continues at a constant speed for 9.8 seconds, before applying the brakes such that the car’s speed decreases uniformly coming to rest 255.79 meters from where it started. The yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop.3)How far does the blue car travel before its brakes are applied to slow down?

Answers

Answer 1

Answer: Well, the car gets to 5.8*3.3=19.14 m/s, getting to 5.8*3.3*3.3=63.162 meters from the start. For 9.8 secons it goes 187.572 meters, a total of 250.734. So, in 5.056 meters, it stopped uniformly. The speed dropped from 19.14 to 0 in 5.056 meters. There was a formula which didn't use time, but I've forgotten it. It would have given us the deceleration and then one could find the time through a 2nd degree equation. The timing for the first two parts is already known.
Either way, we've calculate more than we need to know for this question. You can cut the answer from that 250.734 distance.

Answer 2

Answer:

Answer:

raheh

Explanation:

zdrhdrh

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Answers

Answer:

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Answer:

70 dB is twice as loud as 60 dB.

Explanation:

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Find the elongation produced in a copper wire of length 2m and radius 5mm, when suspended by a blockof mass 500Kg. (Take Young's modulus of elasticity of copper Y = 1,2 ×109 Pa).

Answers

Answer:

0.104 m

Explanation:

Stress, $\sigma=\frac {F}{A}$

Where F is force and A is area. Also, F=mg where m is mass and g is acceleration due to gravity

$Area= \pi r^(2)$

$Strain=\frac {\triangle l}{l}$ where $\triangle l$ is the elongation and l is the original length

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Making $\triangle l$ the subject then

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Once you reach adulthood, you will not experience peer pressure.
Peer pressure is often thought of in negative terms even though it can be positive.

Answers

Answer:

Once you reach adulthood, you will not experience peer pressure.

Explanation:

We tend to believe that self-control comes from within, but many of our attitudes depend as much on friends and family as on ourselves. That's because at any stage of our life (even the adult stage) our friends and our family have the power to influence us, sometimes that influence is good and sometimes bad, it's up to us to reason about them.

The people around us have the power to make us fat, consume more alcohol, worry less about the environment and expose ourselves to the sun without proper protection, among many other things.

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Answers

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