An object with a mass of #5 kg# is on a surface with a kinetic friction coefficient of # 4 #. How much force is necessary to accelerate the object horizontally at # 32 m/s^2#?
Let us use the
According to Newton
In our question, there are two forces:
- Our own force, which we are going to call
- The friction force, which we are going to call
Both forces must be summed up, although with opposite sign, because friction always acts against movement.
We know that friction force can be obtained by:
Now that we know this, we can rewrite
So, we must make a force of 356 N in order to move our object with an acceleration of