Question
Using component of force, show that it is easier to pull a lawn roller than to push it.
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Answer
Apparent weight $=\text{F }\sin\theta+\text{mg}=\text{Reaction (R)}$$\Rightarrow\ \text{f}=\mu\text{R}$
Apparent weight $=\text{mg}-\text{F }\sin\theta$
$=\text{Reaction (R}')$
$\text{f}'=\mu\text{R}'$
As f > f'
So, pulling is easier.
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