Question

can someone help me with this acceleration problem please? Estimate the blood's acceleration during speeding up phase of the motion.

Answer 1

will the equation be (vf-vi)/(tf-ti)?

Answer 2

(0.8-0.0)/(0.15-0.0)

Answer 3

Yes,\[a= \Delta V / \Delta t\]

Answer 4

i got 5.3m/s^2 as the answer but it says it's wrong :/

Answer 5

i meant 0.8-0.0/(1.05-0.0) = 0.761 m/s^2 but it says its wrong

Answer 6

its 0.105 not 1.05

Answer 7

I got 0.8-0.0/(0.105-0.0) = 7.62 m/s^2 but it's still wrong ;/

Answer 8

Ha, sorry it should be .150! XD

Answer 9

so i got 5.3 m/s^2 using 0.15 but it says its wrong

Answer 10

ok lets see what your doing wrong

Answer 11

can you check the graph i uploaded

Answer 12

thanks

Answer 13

I see the problem

Answer 14

is it the horizontal line?

Answer 15

You have the time wrong

Answer 16

from 0 to 0.1?

Answer 17

Yes, you should be writing 0.150 - 0.1

Answer 18

ah crap

Answer 19

That makes sense right? :)

Answer 20

its because the thing starts moving at 0.1 right instead of 0 right ?

Answer 21

Yeah, you see its speeding up from 0.1 to 0.150

Answer 22

ok i got another question pls

Answer 23

\[\frac{ 0.8-0 }{ 0.150-0.1 }\]

Answer 24

That's how it should be

Answer 25

so if it asks me about slowing down

Answer 26

time should be from 0.150 to 0.3 right?

Answer 27

\[\frac{ 0-0.8 }{ 0.3-0.150 }\]

Answer 28

so it would be 0.0-0.8/(0.3-0.150)

Answer 29

Right!

Answer 30

cool thanks. its kind of hard to learn physics in another language ;D

Answer 31

Physics is hard in any language :P

Answer 32

haha thanks mate!

Answer 33

No worries, take care!