- #1
Kamirusen
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Homework Statement
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.
Homework Equations
F=μ*Fn
where
F = friction
μ = coefficient of friction
Fn = normal force
Fn = mass of object * acceleration
The Attempt at a Solution
i solve for Fn first,
Fn = 6 kg * 0 m/s2
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?