You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Word Problem Homework Help
- Thread starter Bogogogo
- Start date
D
Deleted member 4993
Guest
You are given an equation and sets of domains. From those you are supposed to draw some conclusions.
What is the definition of speed that you have been taught?
Are you in Calculus yet?
What are your thoughts? Exactly where are you stuck?
Please follow the rules of posting in this forum, enunciated at:
https://www.freemathhelp.com/forum/threads/read-before-posting.109846/
Please share your thoughts/work with us - so that we know where to begin to help you.
I am confused on how I use the equation to find the cars average speed as the question specifies. I am also confused on that they mean by the numbers varying and how I put that into the equation.You are given an equation and sets of domains. From those you are supposed to draw some conclusions.
What are your thoughts? Exactly where are you stuck?
Please follow the rules of posting in this forum, enunciated at:
https://www.freemathhelp.com/forum/threads/read-before-posting.109846/
Please share your thoughts/work with us - so that we know where to begin to help you.
D
Deleted member 4993
Guest
What is the definition of speed that you have been taught?I am confused on how I use the equation to find the cars average speed as the question specifies. I am also confused on that they mean by the numbers varying and how I put that into the equation.
Are you in Calculus yet?
I am not. And I haven’t been taught a definition of speed yet.What is the definition of speed that you have been taught?
Are you in Calculus yet?
D
Deleted member 4993
Guest
In that case, you cannot be expected to answer the questions.I am not. And I haven’t been taught a definition of speed yet.
D
Deleted member 4993
Guest
yesBy definition of speed do you mean like miles per hour or dist/time?
average speed = (distance traveled) / (time elapsed)
Now referring back to the problem, let's do a(ii) first.
How would calculate the distance traveled, by the particle, from the given equation?
Would you plug the numbers into the equation, then get 2 answers for d and find the average?yes
average speed = (distance traveled) / (time elapsed)
Now referring back to the problem, let's do a(ii) first.
How would calculate the distance traveled, by the particle, from the given equation?
D
Deleted member 4993
Guest
Yes and No. - Lets work step by step.Would you plug the numbers into the equation, then get 2 answers for d and find the average?
What is the value of "d" at t =2? [let's call that d(2)]
What is the value of "d" at t =4? [let's call that d(4)]
What does d(2) & d(4) represent - physically?
D when t=2 is 8,Yes and No. - Lets work step by step.
What is the value of "d" at t =2? [let's call that d(2)]
What is the value of "d" at t =4? [let's call that d(4)]
What does d(2) & d(4) represent - physically?
And d when t=4 is 24
They represent the distance the car has gone after (t)?
Last edited by a moderator:
D
Deleted member 4993
Guest
Correct - butD when t=2 is 8,
And d when t=2 is 24
They represent the distance the car has gone after (t)?
They represent the distance - from where - the car has gone after (t)
Oh, so from the sidewalk?Correct - but
They represent the distance - from where - the car has gone after (t)
D
Deleted member 4993
Guest
Yes - from the cross-walk.Oh, so from the sidewalk?
So then what does
[d(4) - d(2)] represent?
I am unsure. Would it be the distance the car has gone at d(4) [so 8] - d(2) [24]?Yes - from the cross-walk.
So then what does
[d(4) - d(2)] represent?
D
Deleted member 4993
Guest
Draw a little sketch.I am unsure. Would it be the distance the car has gone at d(4) [so 8] - d(2) [24]?
Draw a line to indicate the "line of travel" of the car. Let us assume it is a st. line.
Draw a point O on the line to indicate cross-walk.
Now draw a point X2 to indicate position of car at t=2 (driving away from the cross-walk). The length OX2 will be the distance d(2) you have calculated (do you see that?).
Again draw a point X4 to indicate position of car at t=4 (driving away from the cross-walk). The length OX4 will be the distance d(4) you have calculated.
So the distance traveled in 2 to 4 minutes is [24-8=] 16 feet.
The elapsed time to travel [4 - 2 =] 2 minutes ............................................................................................edited
The car has traveled 16 feet in 2 minutes - what is its average speed? Please post your answer.
Do the same operations for part 'b (ii)'. Please post your detailed (showing steps) answer.
After that we will attack the part (i) of (a) and (b).
Last edited by a moderator:
So since speed- distance/time, the average speed here would be d/t, thus 16/2, which is 8.Draw a little sketch.
Draw a line to indicate the "line of travel" of the car. Let us assume it is a st. line.
Draw a point O on the line to indicate cross-walk.
Now draw a point X2 to indicate position of car at t=2 (driving away from the cross-walk). The length OX2 will be the distance d(2) you have calculated (do you see that?).
Again draw a point X4 to indicate position of car at t=4 (driving away from the cross-walk). The length OX4 will be the distance d(4) you have calculated.
So the distance traveled in 2 to 4 minutes is [24-8=] 16 feet.
The elapsed time to travel [4 - 2 =] 2 minutes ............................................................................................edited
The car has traveled 16 feet in 2 minutes - what is its average speed? Please post your answer.
Do the same operations for part 'b (ii)'. Please post your detailed (showing steps) answer.
After that we will attack the part (i) of (a) and (b).
Then Isolved the other using the same steps:
d1=6.29
d2=10.56
Then,
d=4.27 and t=.7 so d/t= 6.1
And I understand the other parts of the question. Thank you for helping me through this problem.