Search results

um, what grade is this?:eek:

but i do average speed first still right??im confsued about the midpoint interval :confused:

yeah but then on question number 3... it says.. the values you calculaed are the average speeds for the time interval, not the speed of the interval. To be more percise, the average speed is the speed at the midpoint of each time interval, and should be plotted there instead of at the end of...

yeah but then on question number 3... it says.. the values you calculaed are the average speeds for the time interval, not the speed of the interval. To be more percise, the average speed is the speed at the midpoint of each time interval, and should be plotted there instead of at the end of...

wats AP physics??

good job:wink:

Homework Statement Time(s)| Distance(cm) from start 0 | 0 0.1 | 0.6 0.2 | 2.4 0.3 | 5.4 0.4 | 9.6 0.5 | 15 0.6 | 21.6 0.7 | 29.4 0.8 |38.4 0.9 |48.6 1 | 60 1.1 |72.6 1.2 |86.4 1.3 | 101.4 1.4 |117.6 1.5...

do i use Kinematic Equations in grade 10 physics?

huh wat is that?:confused: :confused: :confused:

do u know if there's a site that tells you all the formulas like that so i can memorize them?

yes i am i little bit.. :cry:

i kno v2-v1... but i need to find the initial velocity..mean v1 right?? so how do find v1!

how am i going to get the initial velocity? with a=delta v/delta t??

dleta v means change in velocity:rofl:

Hmm... is it a=delta v/delta t?:confused:

well I am saying i need to find v1...i already kno the acceleration formula...its a=delta v/delta t...:uhh:

Homework Statement in a final burst of energy near the end of a bike race, Julia accelerates at 0.32 m/s^2 north for 15 s, attaining a final speed of 18.6 m/s south. what was Julia's initial velocity and how far did she travel while accelerating? The Attempt at a Solution In this case I think...

Thanks alot!

yes it did! wow

What's Uniform acceleration?? Can anybody please tell me or explain to me an easy way of what uniform acceleration is? I don't understand what my teacher is telling us!:cry:

oh i never knew that lol! thnx:eek:

oh ok thnx:tongue:

but do u kno how i would do deceleration?

ohh, yes i forgot about that! thanks !

v1 and v2 : velocity there's only seconds and one velocity...

if so, I am not sure how i would get the v1 and v2

umm ok so to calculate a) the braking distance...would i use the a= delta v/delta t formula? If so then what do i use next?

yes , i know those formula but thanks for pointing those out:tongue: But I'm a little confused on how to find the deceleration!

oh yes and antiderivative if you do send them to people thanks a lot for taking time.

yes I am interested in those too, if you do happened to have it please send an email to me! Thanks

Homework Statement When a car is being tested, it also has a braking test done/ In one such test a car took 3.0 s to stop from 40 m/s. Calculate a) the braking distance b) the deceleration The Attempt at a Solution first off I'm not sure how to find the braking distance and what...

kk, thanks a bunch:tongue2:

what do you mean by working out the acceleration?

but the question asks for time

Okay...thanks for taking your time :rolleyes:

Yeah, so it's 23 but i was just saying...how would i put that in the formula in the proper way... delta t= delta v/a, delta t= (40-12)/5.0s, delta t =28m/s /5.0s = 5.6s therefore the rocket traveled for 5.6 s?

the knowns are velocity and acceleration, yeah i know that you substitute them but would i do (40-12) to find the velcoity? so like for (40-12) do i plug that in velocity together?

Thanks neutrino.. but would i do (40-12) to find the velcoity?

1. Homework Statement hi this is the problem: the burning of the second stage of a two stage toy rocket takes the rocket from 12 m/s to 40 m/s in 5.0s. How far does the rocket during this time? 2. Homework Equations would i use delta t= delta v/a ? would the given info be.. delta v1=...

sorry , but i think you must be patient because all the homework helpers are helping others too. Please just wait and do your other homework questions.

Im not sure if this is the correct formula for this question, please corect me Homework Statement hi this is the problem: the burning of the second stage of a two stage toy rocket takes the rocket from 12 m/s to 40 m/s in 5.0s. How far does the rocket during this time? Homework Equations...

Alright, thanks a lot cristo for ur help and KingNothing for the formula. Thanks.

oh so would i just do 39-27? which is 12 m/s?

But if i was to use a=delta v/delta t .. how do i put to veclotiys? 39 m/s to 27 m/s

thanks KingNothing

but we usually use the average velocity=delta d/delta t formula.. oh..i fthink its this formula a=delta t + v2-v1 is this correct?

umm well my teacher taught us this new displacement formula but i dunt think its related to the question i need help with .. but this is the formula he taught us: d= v1 deltat+1/2 a(deltat)2 sorry i dunt kno how to make the traingle for delta and the arrow heads... I am new to this

Homework Statement Swati was driving her car over the speed limit when an oncoming car car flashes its lights warning her of a radar trap ahead. She decelerates from 39 m/s to 27 m/s in 6.0 s. What deceleration did her brakes apply? - I am not sure what formula to use so does anyone have a...