Question

pls solve the problem and mention all the steps used.<br /><br />THANK YOU SO MUCH

Answer 1

br is greater than r as br is br and cannot be changed  angle r is greater than br

Answer 2

Force exerted by A on B = 1kg (here, first we have to convert kg into N)
= (1 × 10)
= 10N

Force exerted by B on C = 1kg + 2kg
= (1×10) + (2×10)
= 10N + 20N
= 30N

Force exerted by C on D = 1kg + 2kg + 3kg
= (1×10) + (2×10) + (3×10)
= 10N + 20N + 30N
= 60N

Force exerted by D on ground =
=1kg+2kg+3kg+4kg
= (1×10) + (2×10) + (3×10) + (4×10)
= 10N + 20N + 30N + 40N
= 100N

Hence, the answer is :
D) 10N, 30N, 60N, 100N