Finding out the horizontal force required to make an object move.

AI Thread Summary
To determine the horizontal force needed to move a 52 N ice fishing hut on a frozen lake, the coefficient of static friction between the hut and the ice is essential. The static friction can be calculated using the formula μs = Fs/Fn, where Fs is the maximum static friction force and Fn is the normal force, which equals the weight of the hut. Without the coefficient of static friction, the exact force required cannot be calculated. If the ice is nearly frictionless, even a minimal force could initiate movement. Understanding these principles is crucial for solving the problem effectively.
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Homework Statement


An ice fishing hut weighing 52 N sits on a dry, frozen lake.
What is the magnitude of the initial horizontal force required to make the ice fishing hut start sliding across the surface of the frozen pond



Homework Equations


μk = Fk/Fn or μs = Fs/Fn


The Attempt at a Solution


Find out Static Friction

Fnetx = FA + FS
Get rid of vectors so it rearranges to...
-FS + FA or FA - FS
See if m*a is equal to the Fnet
ma = -FS + FA
No mass or acceleration is given so I am unaware on how to discover the applied force which in turn would allow me to get the Static friction(max)
 
Physics news on Phys.org
Welcome to PF.

No mass [...] is given
Are you not told the weight of the hut?

Note:
http://www.u-picardie.fr/~dellis/Documents/PhysicsEducation/The%20coefficient%20of%20friction.pdf
... not sure how you are expected to find the coefficient of static friction: look it up?
 
Last edited by a moderator:
The mass of the hut can be determined from its weight. But what is more important to know is the static coefficient of friction between the hut and ice. The hut will move and accelerate when the applied force exceeds the max static friction force. If the ice is considered frictionless, it'll move with the slightest breath.
 

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