Question

pls solve the problem and mention all the steps used.

THANK U SOOOOOO MUCH

Answer 1

Force exerted by A on B = 20N + 2kg (Here first we have to convert kg into N i.e. Newton)
= 20N + (2 × 10) which is mass × acceleration due to gravity.
= 20N + 20N
= 40N

Force exerted by B on C = 20N + 2kg + 4kg
= 20N + (2×10) + (4×10)
= 20N + 20N + 40N
= 80N

Force exerted by C on D= 20N+2kg+4kg +6kg
= 20N + (2×10) + (4×10) + (6×10)
= 20N + 20N + 40N + 60N
= 140N

Force exerted by D on ground=
=20N+2kg+4kg+6kg+8kg
= 20N + (2×10) + (4×10) + (6×10) + (8×10)
= 20N + 20N + 40N + 60N + 80N
= 220N

Hence, the answer is :
D) 40N, 80N, 140N, 220N