Question

12. The forces exerted by A on B, B on C. C on D and D on ground are
a) 50 N. 8ON. 140 N 220 N
20 N
b)40 N.70 N. 140 N. 220 N
c) 40 N. 80N, 130 N, 220 N
d)40 N. 80 N, 140 N, 220 N
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Answer 1

Answer:

d.

Explanation:

force on B due to A will be 20N + weight of A

weight of A = 2g= 20N

thus force on B = 40N

similarly

force on C = force on B + weight of B

40+40= 80N

force on D = force on C + weight of C

80+60= 140N

thus option d is correct

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