This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Force applied by you = 10N
length of key = 5cm
so force arm for you = 5cm

let resistance offered by levers of key = F
distance of levers = 1cm
so force arm for lever = 1cm

Balancing the moments,
10N × 5cm = F × 1cm
⇒ F = 50N

So resistance offered by the levers of the lock is 50N.