Question

simpson drives his car with an average velocity of 48km/h to the east.How long will it take him to drive 144 km on a straight highway?

Answer 1

Okay let's start figuring out what we have.

Answer 2

So what is 48km/h?
& 144km ?

What goes where?
x= ?
t=?
avg= ?

Answer 3

>_> I see you're not replying eh?
welp, you should use the Average Velocity formula and find what you are missing!
Plug in the numbers you have and find what you need.

Answer 4

sorry mom made me throw out the trash! but im back!!!

Answer 5

Oh okay! Let's do this problem.

Answer 6

So tell me what goes where?

Answer 7

well x=48

Answer 8

No that's incorrect.

Answer 9

avg=48

Answer 10

x is the displacement btw.

Answer 11

Yes, that's correct.

Answer 12

x=144

Answer 13

Right! So what formula do you think we should use?

Answer 14

(unless you physics teacher didn't teach you about this )

Answer 15

Varg*Δt=Δx

Answer 16

well. The original problem for average velocity would be Avg = Δx / Δt

Answer 17

^ keep that in mind.

Answer 18

So what are looking for?

Answer 19

okay yeah i got that equation from there

Answer 20

From the previous, what are we missing??
We got x & the avg. What do we need?

Answer 21

time!

Answer 22

Yes! :D

Answer 23

So let's rearrange Avg = Δx / Δt

Answer 24

Try to make Δt alone.

Answer 25

Δx*Avg=Δt ?

Answer 26

Incorrect. Look carefully.

Answer 27

You can't multiply Δx, because Δx is in the numerator.

Answer 28

Although you were correct on multiplying, but the wrong part.

Answer 29

so...
Δx/Avg ?

Answer 30

Yes correct!

Answer 31

so you have Δt = Δx / Avg

Answer 32

All you do is plugin and you get your answer. I hope this help! :]

Answer 33

is it 3?

Answer 34

Yes ! 3 hours. :]

Answer 35

okay thanks! i haven't actually understood this till now! its actually really easy ! :D