ICSE − Q & A

Can anyone answer q6 and Q10 from examples of chap 1 ex 1 from concise Selina

But if any 1 can't find it than I m typing the quest
Q6:-the following sudden fig.1.19 shows two parallel and opposite forces F1 and F2 each if magnitude 5n with their line of action seperated by a distance of 2m. a point X lies midway between F1 and F2.
a) calculate the total moment of the two forces i)x.  ii) y
b) State the effect produced by the two forces about the points x and y.

Q10:-fig 1.22 below shows a uniform metre rule AB pivoted at its end A at the 0cm mark and supported at the other end B by a spring balance when a wright of 40kgf is suspended at its 40cm mark. This rule stays horizontal. Find the reading of the spring balance when the rule is of 
i) negligible mass
ii) mass 20kg
Pls. Explain me frends b'coz I'm not understanding them
Pls..yaar😭😭😭😵😧😫😓
Help me out guys

is anybody still awake

what is meant by additive quantity

For all those who have done bad in their prelims physics paper 
just think that u are a big match player , your performance is dependent on the occasion 
all the previous exam were just a small battle but if u win this last battte of physics tommorow  u win the war
remember that the numbers which u get on the paper will have no value in your life  its  the journey which u traveled to get that numbers which will built your personality and direct  your life 
give all that u got .NO GUTS NO GLORY .
LETS NUDE THE PHYSICS PAPER COMPLETELY TOMORROW

if radium undergoes radioactive disintegration and releases 2 beta particles,
what is the source of energy during this decay?
(not a made-up doubt, from a prelim paper... didn't understand the question)