(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

in the physics laboratory experiment, a 6 kg box is pushed across a flat table by horizontal force F. if the box is moving at a constant speed of 0.35 m/s and the coefficient of kinetic friction is 0.12. what is the magnitude of F.

2. Relevant equations

F=μ*F_{n}

where

F = friction

μ = coefficient of friction

F_{n}= normal force

F_{n}= mass of object * acceleration

3. The attempt at a solution

i solve for F_{n}first,

F_{n}= 6 kg * 0 m/s^{2}

and got an answer of zero for normal force.... i let the acceleration to be zero because it says that it has constant speed..... Is it normal to have a zero normal force?

and then when i solve for the magnitude of friction....

F = 0.12*0

which is zero also... .....

i'm not sure if i got a wrong equation, but i think its correct...... or if i got some wrong interpretation of the given values that results to zero friction.......

My question is, is it a normal thing for an object with constant speed to have a zero friction?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Magnitude of object with constant speed

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