Question

Is it easier to pull a roller than to push it. Why?

Answer 1

Ya bro that is easier to pull roller than to push due to gravitational force, so that earth exert force on roller, if pull roller then power should be apply more

Hope this Ans will help you.

Answer 2

When we pull a lawn mower the vertical component of the applied full acts opposite to the weight of the mower and it reduces its effective weight. On the other hand when a lawn mower is pushed the vertical component of the applied push adds to the weight of the mower and hence its effective weight increases.
Thus the effective weight is lesser when the lawer mower is pulled