# phyics

posted by .

If two cars are traveling along a straight road, one behind the other. the first is traveling at a constant velocity of 10 m/s. the second, approaching from the rear, is traveling at 22 m/s. when the second car is 300m behind the first, the driver applies the brakes, producing a constant acceleration of -0.40 m/s^2. will the cars crash and if so, where and when?
I find this really hard to understand

• phyics -

will it hit?
use final velocity of 0 presuming that it came to a halt
find the time elasped for it to stop using acceleration = change in v over change in t
use the time to find how far both have traveled...
yes it will hit
it;s an equation of what time used for second car to travel 300+11t
since we don't know the final velocity cant use equations of it
so use change in x = intial v (t) + 1/2 a t^2
so 300+11t=22t+(-2)t^2
2t^2-11t+300=0
using solve t using quadratic formula to see what time will it hit
The passage describes a physics problem involving two cars traveling on a straight road, with the second car decelerating to avoid a collision. The text includes a detailed explanation of the steps to solve the problem, including the use of kinematic equations and the quadratic formula.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
# phyics

posted by .

If two cars are traveling along a straight road, one behind the other. the first is traveling at a constant velocity of 10 m/s. the second, approaching from the rear, is traveling at 22 m/s. when the second car is 300m behind the first, the driver applies the brakes, producing a constant acceleration of -0.40 m/s^2. will the cars crash and if so, where and when?
I find this really hard to understand

• phyics -

will it hit?
use final velocity of 0 presuming that it came to a halt
find the time elasped for it to stop using acceleration = change in v over change in t
use the time to find how far both have traveled...
yes it will hit
it;s an equation of what time used for second car to travel 300+11t
since we don't know the final velocity cant use equations of it
so use change in x = intial v (t) + 1/2 a t^2
so 300+11t=22t+(-2)t^2
2t^2-11t+300=0
using solve t using quadratic formula to see what time will it hit
user
The passage describes a physics problem involving two cars traveling on a straight road, with the second car decelerating to avoid a collision. The text includes a detailed explanation of the steps to solve the problem, including the use of kinematic equations and the quadratic formula.

TYPE: SINGLE_QUESTION_WITH_ANSWER