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The ease with which you push or pull depends on the amount of friction acting on it.

**When you pull** with a force F, the vertical component of force will be upward. So the net vertical force will be less than weight of lawn mower. So the normal force will be less(N = mg - F sinФ, where Ф is the angle with which you are pulling) and hence **friction will be less**.

**When you push** with a force F, the vertical component of force will be downward. So the net vertical force will be more than weight of lawn mower. So the normal force will be more(N = mg + F sinФ, where Ф is the angle with which you are pushing) and hence **friction will be more**.

So pulling is easier than pushing.

So pulling is easier than pushing.

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When we pull a lawn mover, the force exerted is directed outwards from the ground along the lawn mover handles. The force F applied through hands, is inclined at an angle Ф to the (horizontal) ground. Let the lawn mover have a mass m.

The

Due to reduced normal reaction, the friction (static or kinetic) Ff between the lawn mover and the ground will be reduced from μ m g to μ (m g - F Sin Φ). Hence it is easy to move it along the ground.

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the net horizontal force to drive lawn mover = F Cos Φ - μ mg - μ F Sin Φ

=

Clearly this force is much less compared the force available in case of pulling the lawn mover.

Minimum Force to be applied by us to move it = F

Clearly this is more than in case of pulling the lawn mover.