How to Calculate Force of Water in Rotating Pail | Physics Problem

In summary, a pail of water with a mass m is being rotated in a vertical circle with a radius of 1.4m and an acceleration of gravity of 9.8m/s^2. The pail is rotated at a constant rate, resulting in minimum speed at all points along its circular path. When the pail is at the bottom of the circle, the magnitude of the force exerted by the water on the bottom of the pail is F=ma=0. However, it is important to remember to add the sigma in the equation, as F=ma is rarely true. Additionally, drawing free body diagrams can help in solving problems. The water exerts two forces on the pail: its weight
  • #1
nrc_8706
70
0
a pail of water is rotated in a vertical circle of r=1.4m acceleration of gravity 9.8m/s^2

the pail is rotated at a constant rate so it has the minimum speed at all points along its circular path. the water has a mass m.
when the pail is at the bottom of the circle, what is the magnitude of the force exerted by the water on the bottom of the pail?

F=ma=0 since it is at a constant rate right?

but then i don't know what to do next?
 
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  • #2
nrc_8706 said:
a pail of water is rotated in a vertical circle of r=1.4m acceleration of gravity 9.8m/s^2
the pail is rotated at a constant rate so it has the minimum speed at all points along its circular path. the water has a mass m.
when the pail is at the bottom of the circle, what is the magnitude of the force exerted by the water on the bottom of the pail?
F=ma=0 since it is at a constant rate right?
but then i don't know what to do next?

Nay! Draw out your free body diagrams, that should help.

Also, I notice a lot of people making this mistake. Saying F = ma is rarely true. Always remember to add your sigma

[tex]\sum F = ma[/tex]
 
  • #3
?

normal force is upward and weight is downward

Fnet=Fn-mg?
 
  • #4
Help!

CAN ANYBODY HELP ME?!:cry:
 
  • #5
nrc_8706 said:
CAN ANYBODY HELP ME?!:cry:

the water exerts two forces onto the pail... can you name them?
 
  • #6
:confused: its weight and...:confused:
 
  • #7
Centripital Force
 
  • #8
...

ok so its F=4mg or F=2mg?
 
  • #9
Centripital force is defined by equation:

Fc = (m*v^2)/r
 
  • #10
gracias

:rolleyes: thanks for everything but I am just not understanding
 
  • #11
What is your current curriculum/topic in class?
 
  • #12
Dynamics Of Uniform Circular Motion
 

FAQ: How to Calculate Force of Water in Rotating Pail | Physics Problem

What is a "Pail homework problem"?

A "Pail homework problem" is a type of assignment given to students in which they are asked to solve a problem related to pails or buckets. This could involve calculating the volume of a pail, determining how many pails are needed for a certain task, or solving a word problem involving pails.

Why do teachers assign "Pail homework problems"?

Teachers may assign "Pail homework problems" to help students practice their problem-solving skills, apply math concepts to real-life situations, or reinforce the concept of volume and measurement. Pails are also a common household item, making these types of problems relatable and applicable to students' daily lives.

What skills are needed to solve a "Pail homework problem"?

Solving a "Pail homework problem" requires knowledge of basic math concepts such as measurement, volume, and multiplication. Critical thinking skills and the ability to apply math to real-life situations are also important.

How can I approach solving a "Pail homework problem"?

When solving a "Pail homework problem", it is important to carefully read and understand the problem, identify the given information and what is being asked, and choose an appropriate formula or method to solve the problem. It may also be helpful to draw a diagram or use manipulatives to visualize the problem.

What are some common mistakes to avoid when solving a "Pail homework problem"?

Some common mistakes to avoid when solving a "Pail homework problem" include misreading the problem, using the wrong formula or method, forgetting to convert units of measurement, and making calculation errors. It is important to double-check your work and make sure your answer makes sense in the context of the problem.

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