Using free body diagram show that it is easy to pull an object than to push it

Explanation

An object is pushed at an angle `theta`
`N_("push")=mg+Fcostheta`
`f_(s)^(max)=mu_(s)N_(push)=mu_(s)(mg+Fcostheta)`

An object is pushed at an angle `theta`
`N_("pull")=mg-Fcostheta`
`N_("pull") lt N_("push")`

So, it is easier to pull an object than to push to make it move.