why is pulling considered better than pushing?

Asked by Swathy K L | 17th Nov, 2012, 05:55: AM

Expert Answer:

The static Friction is greater while Pushing as compared to pulling and thus it is easier to pull when compared to pulling.
For example,

Resolving forces in putting a lawn roller:

Which pulling a lawn roller, the forces are resolved as above. Now It is easy to pull a lawn roller than to push it because while pulling we can see two components of vertical forces as,

N? normal reaction.

F sin ??Vertical component of the force F.

As a result the affect weight decreases as —

N = mg – F sin ?

As the result the frictional force which is fs = Nrs win decrease on the roller ai it will be easy to pull it.

If a force 'F' is applied by us on the ground then flour will give a reaction force in opposite direction. Even a component of this force along with the frictional force (fs) will push us in forward direction. The N, mg ai F sin ? only helps in maintaining the body balance and the net forces in forward direction will push us forward.

 

Answered by  | 17th Nov, 2012, 11:42: AM

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