Question

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

Ans. (2) 20N​

Answer 1

Given that,

Mass of block A = 4 kg

Mass of block B = 2 kg

We need to calculate the tension in block B

Using formula of tension

$T=mg$

Where, m = mass of block B

Put the value into the formula

$T=2g$

We need to calculate the normal reaction between block A and ground

Using balance equation

$T+N=mg$

Where, T = tension

N = normal reaction

m = mass of block A

g = acceleration due to gravity

Put the value into the formula

$2g+N=4g$

$N=4g-2g$

$N=2\times10$

$N=20\ N$

Hence, The normal reaction between block A and ground is 20 N.

(2) is correct option

Answer 2

Answer:

hope this will help you and sum of upside force=downside force....✨