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Answer to Question #78773 in Mechanics | Relativity for mehar
Question #78773
A 60kg person exerts a horizontal force of 200N and pushes a 90kg object through a distance of 6m along a horizontal floor . He does that at a constant velocity of 3m/s. What is the force of friction?
Expert's answer
According to the Second Newton’s Low
F ⃗=ma ⃗
In our case
v_x=const → a_x=0
We have
200-F_f=0 → F_f=200 N
F ⃗=ma ⃗
In our case
v_x=const → a_x=0
We have
200-F_f=0 → F_f=200 N
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