Question

1.)A car travelling at 15m/s , slows down uniformly at rest in 6.0
a)how far does the car travel during the 6.0 s
seconds?
b)what is the car travel during the 6.0 seconds?

2.)A car takes 10 s to go from 0m/s to 24 m/s at constant acceleration
a)what is the value of a
b)find the distance for this

Answer 1

for the 1st one i can do distance like what we used earlier right

Answer 2

We need acceleration first. Its not 9.8 this time.

Answer 3

so since velocity is change i velocity/ time we use this eq

Answer 4

Okay we will use this equation. \[D=\frac{ 1 }{ 2 }(u+v)t \]Now can you show me how to use that equation?

Answer 5

yes:)

Answer 6

Okay what is the initial velocity?

Answer 7

ok would it be 1/2(1+6)

Answer 8

initial v is 15

Answer 9

Yes, and final velocity?

Answer 10

6.0

Answer 11

6.0 is time (In the question). Final velocity is 0 "slows down uniformly at rest"

Answer 12

kk initial velocity is 15 and the final is 0 so 1/2 (15+0)6.0

Answer 13

Yes.

Answer 14

k i got 45

Answer 15

Correct!

Answer 16

yay:)

Answer 17

so for be all i need to do is d/t right which is 15/6.0?

Answer 18

Brb gotta do stuff in the house.

Answer 19

kk

Answer 20

I don't quite understand the 1b

Answer 21

oh its suppose to say what is the cars average velocity during 6.0 seconds .i got 2.5

Answer 22

The average velocity is the distance/time= 45/6=7.5m/s

Answer 23

smt yeah i got that t dnt know why i typed that

Answer 24

Its okay.

Answer 25

for 2 a its acceeration so i can use vf-vi/t?

Answer 26

That's what you use.

Answer 27

im right??

Answer 28

Yes you are.

Answer 29

yay i got 25-0/10=2.5

Answer 30

24 not 25 so a=2.4

Answer 31

how come i get 2.5 in my calculator?

Answer 32

Just a typo.

Answer 33

kk so if i fint distance it would be 1/2 at^2

Answer 34

Yes. Note that a=2.4

Answer 35

y do i keep geting 2.5 isaiah???:(

Answer 36

The question says "A car takes 10 s to go from 0m/s to 24 m/s at constant acceleration"

Answer 37

1/2 (5)(0)(25)

Answer 38

1/2(2.5)(100)

Answer 39

y u did use 10 s instead of 100?

Answer 40

t^2. t is 10, t^2 is 10^2=100

Answer 41

ohhhhhhhh k i get it

Answer 42

k thanks alot u r very patient

Answer 43

Thank you.

Answer 44

What's your name?

Answer 45

rissa

Answer 46

Schon, dich kennen zu lernen Rissa. :)

Answer 47

what does that mean? nic e to meet you rissa?

Answer 48

Yes. You know German?

Answer 49

lol nope