An object of mass m slides down an incline with angle 0.
2 answers:
Answer:
B). 
Explanation:
As we know that the force on the mass "m" which slides along the inclined plane is along the inclined surface
So it must have accelerated along that surface only
So we can write the equation for force along the inclined plane as

now if we wish to find net force perpendicular to the plane then we can say that it must be zero
Because perpendicular to the plane the net force on the given mass must be zero as it is not accelerating along that direction
So here we can say

so we have

<h3>Answer</h3>
B)
FN - mgcosФ = 0
<h3>Explanation</h3>
Given the mass of an object, forces that will be acting on it are as following
- Force due to gravity (weight) of an object
- The Normal force (the perpendicular force from that the inclined surface exerts on the object)
- Any frictional forces (due to static friction or kinetic friction, if applicable) along the incline
- The corresponding force component along the incline (downhill force due to gravity)
Force due to gravity = -mgcosΔ
Normal force = fN
Frictional force = -f
force applied forward = mgsinΔ
Horizontal force = mgsinΔ - f
vertical force = fN - mgcosΔ
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