Problems for Physics Lovers (Who never give up)

Hello Guys and welcome back to my blog !!!

Today I am gonna post some easy but challenging Physics problems 
(Advisory Content - Only to be solved by Physics Experts/Lovers)

Universal Physics Expertise Problem #1  (TOUGH)

 

Calculate the Force Change if both the boxes are the same

HINT :To be only used if answer not found after full effort by trying

Universal Physics Expertise Problem #2  (EASY)

Values for calculating limiting friction are 
mew s = 0.4 
normal = 19.5 N

Find

1. Limiting Friction acting here
2. Friction acting on the box

(HINT - Mass= 5kg velocity = 0 m/s & F (l) = Mew s x N)

a) If you have found the answer post it in the comments 

b) If not wait for the answers with the explanation published tomorrow

c) Tell me whether you want even tougher ones

That is it for today 

I will be back soon with more challenging physics problems

Till then Bye

Your

Universal Physics Expert 

Signing Off

Khushil