Question
Tue January 29, 2013 By:
 

It is easier to pull a lawn roller than to push it. Explain using the resolution of forces.

Expert Reply
Tue January 29, 2013
it is because when we pull/push a lawn mower, we apply  a force in the direction of its handle which is at an angle with the ground.
So there is always a component of force normal to the ground.
Thus when we pull, we reduce the net normal acting on the grond and thus reduce the frictional force and making it easier to pull, but when we push, we add to the normal force.
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