why there is more friction when we push an object than when we pull it?

Answer 1

First of all, gravity does have an impact even if we assume that the object being pushed or pulled is on a level surface. The acceleration of gravity provides a force (i.e. the weight of the object, not to be confused with the mass). Frictional coefficients commonly require this force. Do the load diagram.

Secondly, the increase in friction may or may not be significant. Pushing the object (pushing force) combined with gravity results in a moment about the objects edge where the face the push is applied to meets the frictional face. This moment results in the object tending to "nose" down. If the surfaces are smooth, there is no noticable increase load at the nose area. If at least one surfaces is rough, the frictional load will increase drastically. Assuming you could apply the pushing force at the exact edge of the object, the moment would not exist.

Pulling by comparison exerts a moment about the leading edge that counteracts the frictional force, but only to a point. Pulling can still result in the leading edge "nosing down" and focusing the frictional force at this point. This depends on the center of gravity and shape of the object.

Answer 2

That is because frictional force is directly proportional to the weight of an object. The force also depends on the coefficient of friction. The coefficient of friction has to do with surface roughness of the contact. When you push an object, you tend to push down which in turn increases the weight of the object and thus increase the force required to move the object. When you pull an object, you tend to lift up which in turn decreases the weight of the object and thus reduce the force required to move the object.

Answer 3

Friction is when a object is stopped or slowed down when it
rubs hard on another object so pushing causes friction since it is oushed on. Pullin on the other hand is stopping friction although
at a point there is friction involved when pulling.

Answer 4

on resolving the force a component while "push" => f.cos(theta) is acting downwards resulting a pressure which press the object against ground while the same component acts upward while pulling thus reducing the effective down force by the object. this is responsible for pushing more difficult than pulling

Answer 5

it depends on what angle you are pushing or pulling and the texture of the surfaces in contact, however most of the time the difference in friction between pushing and pulling is none to negligible.

and gravity has no effect on pushing and pulling friction unless you are pulling up or at an upward angle

Answer 6

When we push an object, we tend to natually bear down more pressure on it against the floor surface. When we pull an object behind us, the force used is balanced out pretty much, with a slight degree of more pressure near the very rear of the object intersecting the floor.

Answer 7

this is a false statement and is being promoted by the coaching institutions. pushing is harder or easier than pulling totally depends on direction of forces and resultant of all applied forces. for the example pulling a body on a inclined surface upwards is very difficult but for pushing is easy (even it will slide down without applying any force i.e. due to gravity). there are infinite number of such examples.

Answer 8

it depends on the surface of the pbject and the ground....otherwise it doesnt whether u pull it or push it ...you have same amount of friction

Answer 9

when you push an object, it has a natural tendancy to drive downward, but when you pull an object, it tends to lift up as you apply force.

Answer 10

when u pull, you have the gravity power also pulling the object by your side. when u push, you are acting against gravity. thats y.