## kym02 Group Title find the force of a bacteria of velocity 20nmμs-1 in the bloodstream of a patient along a vein of length 1mm, if the mass of the bacteria is o.o1μg. one year ago one year ago

Force is in N, do you know the formula?

2. kym02 Group Title

F=ma, that's all i know

what exactly is velocity 20nmμs-1 ???

@TuringTest

5. kym02 Group Title

its the rate at which the bacteria is travelling 20 newton metres, and the μ is the symbol for mu,,,,,i'm not really familiar with these units

6. kym02 Group Title

hello?????!!!!!!!!!!!!

7. ghazi Group Title

$V= \frac{ 20 * 10^ {-9}}{ 10^{-6} }=20*10^{-3} m/s$ and length = 0.001 m now firstly, find the acceleration using the relation $U^2=2*a*D$ where D is distance $a=\frac{ U^2 }{ 2D }=(20*10^{-3})/2*10^{-3}=10 m/s^2$ now force F=mass * acceleration$F= 10^{-8}* 10= 10^{-7} N$ = 10^(-7) N hope this helps you and remember every power is negative :D

8. kym02 Group Title

thank you sooooo much!!!!!!!!!!!!11

9. ghazi Group Title

:D YW

10. kym02 Group Title

what's the correct way of writing 10^(-7) N?

11. ghazi Group Title

|dw:1359595444224:dw|

12. kym02 Group Title

oh ok and one more thing is that a multiplication sign?

13. ghazi Group Title

NO, that is power of 10 or exponent of 10

14. kym02 Group Title

i meant this

15. ghazi Group Title

i dont know what you meant

16. kym02 Group Title

sorry i tried to draw i meant the sign between the 20 and 10(-7) at the first part where you calculated velocity

17. ghazi Group Title

thats multiplication hope you have seen it for multiplication thing

18. kym02 Group Title

oh ok thanks for you help! my teacher is a hand full he's so unfair!

19. ghazi Group Title

its okay :)

20. kym02 Group Title

ok take care bye! i now know who to come for when i need help

21. ghazi Group Title

see ya :)