Question

18. In the arrangement shown, the normal reaction
between the block A and ground is

detailed answer plzz​

Answer 1

Answer:

20N

Explanation:

For equilibrium of 2kg−

T=2g where g=9.8m/s2

And for equilibrium of 4kg−

⟹T+N=4g

⟹N=4g−T=2g

⟹N=2 × 10

⟹N=20N

Answer 2

Answer:

(2) is correct option

Explanation:

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= 2×10

N= 20 N

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

(2) is correct option

hope it helps

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