Force exertion by liquid in a jar

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SUMMARY

The discussion focuses on calculating the force exerted by a bacterium with a mass of 10e-10 kg clinging to the rim of a jar. The relevant equations include centripetal acceleration (Ca = V^2/r) and Newton's second law (F = m*a). The user attempted to calculate the force using the centripetal acceleration derived from a velocity of 50.0 m/s and a radius of 0.350 m, resulting in a value of 7142.86. However, the user encountered issues with WebAssign not accepting their answer, indicating potential misunderstandings about the forces at play.

PREREQUISITES
  • Understanding of Newton's second law (F = m*a)
  • Knowledge of centripetal acceleration (Ca = V^2/r)
  • Familiarity with units of mass and force in physics
  • Basic grasp of rotational motion concepts
NEXT STEPS
  • Review the principles of centripetal force and its application in circular motion
  • Study the relationship between mass, acceleration, and force in different contexts
  • Explore common pitfalls in physics problem-solving, particularly in online platforms like WebAssign
  • Investigate the effects of additional forces acting on objects in motion, such as friction or gravity
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone involved in problem-solving related to forces and motion, particularly in the context of online homework systems.

Edemardil
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c) With what force must a determined 10e-10 kg bacterium cling to the rim?

Homework Equations


(a) (1rev/2.199m)(50.0m/s)(60s/min) to get w =1364 rev/min

(b) Ca = V^2/r = 50.0^2/r
I got the radius from 0.700*0.5 = 0.350
2500*0.350 = 7142.86

(c) F = m*a

The Attempt at a Solution


[/B]
(c)
I looked it up and found one reply somewhere that said it's just using the F = m*a and I found some other stuff. I tried them all and get no right anwser that WebAssign will input.

So first I did:

7142.86*10e-15 but that was wrong.

I think that the Cf should be the Ca*mass so either I'm wrong or webassign is not taking my anwser.
 
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Edemardil said:
c) With what force must a determined 10e-10 kg bacterium cling to the rim?
The force with which the bacterium clings to the rim is not the only force acting. Can you think of what other force or forces might be involved?