A runner runs in a straight line with the average velocity of 5i-hat m/s for 5 minutes and then with an average velocity of 4i-hat m/s 4 minutes. a) what is her total displacement: b)What is her average velocity during this time c) suppose her goal is to run 5 km in 15 minutes. What average velocity must she have over the remaining portion of her run?

Question

anonymous · Answer

Hm, im a little confused. If there asking which out of these methods are correct for this it would be B.

kkutie7 · Answer

that's not the question.

anonymous · Answer

Ah ok. Do they mean to describe the meanings in form. A,B,C,D,ETC. Sorry a little confused on the instructions

kkutie7 · Answer

no a) needs an answer which I have at 2460m
b) and c) have different answers too

princeharryyy · Answer

5i-hat  wats this @Kkutie7

kkutie7 · Answer

vectors.

princeharryyy · Answer

wats that i-hat i haven't seen this ...

kkutie7 · Answer

its i with a ^ on top. its just another way to say x-coordinate

princeharryyy · Answer

would u write the form for me @Kkutie7

kkutie7 · Answer

i don't know how on here http://citadel.sjfc.edu/faculty/kgreen/vector/block1/func/img16.gif closest thing I could find.

princeharryyy · Answer

so would it be 5(i +j) or something else

kkutie7 · Answer

nope

kkutie7 · Answer

just ignore that

princeharryyy · Answer

if u don't kno how to write it than how did u get the answer

princeharryyy · Answer

@Kkutie7

kkutie7 · Answer

I can write it just not on here. plus. that's not even what I'm having issues with. you are having issues with it.

princeharryyy · Answer

see i haven't seen this they either give the vector as 5i + j or they give you the point ...
and this is this i think is one of the easiest ques .... if u kno wat actually the 5i-hat means .... @Kkutie7

princeharryyy · Answer

see if this is 5i cap that means than u just change the metric system cos one is in m/s while other in minutes @Kkutie7

kkutie7 · Answer

i already did that.

kkutie7 · Answer

i already answered a

kkutie7 · Answer

I'm working with one dimensional sets. x is the y-axis and t is the x-axis. its about particle movement or body movement.

princeharryyy · Answer

were u able to do the b part @Kkutie7

kkutie7 · Answer

no but i have the answer i just need the work

princeharryyy · Answer

use this => D1 + D2 = S*9min

princeharryyy · Answer

d1 is the distance covered in 5 min d2 is distance covered in 4 min which should b equal to distance covered in 9 minutes

princeharryyy · Answer

S is the average speed @Kkutie7