Question

18. In the arrangement shown, the normal reaction
between the block A and ground is
(1) 10 N
(2) 20 N
(3) 40 N
(4) zero

Answer 1

Let, Tension in the string = T

For block B,

T = mg (to attain equilibrium)

T = 2g

For block A,

T + N = mg (to attain equilibrium)

2g + N = 4g

N = 2g

N = 2(10)

N = 20N