Question

The normal reaction between 2 kg and 3 kg block is
10N
2kg 3kg
25N​

Answer 1

Answer:

For block A, F=M

T

a where a, acceleration of the system and M

T

is total mass of the system.

a=

3+2+1

12

=2m/s

2

Consider block B, the contact force between 2kg and 1 kg is T

c

=1a=2N

solution

Answer 2

Given,

Block A of mass 2kg

Block B of mass 3kg

To find,

The normal reaction between block A and block B.

Solution,

If we draw a free body diagram for block A,

the normal $N_1$ will act upwards and 2g will act downwards.

Similarly for block B,

the normal $N_2$ will act upwards while 3g due to the weight of block B and 2g due to the weight of block A will act downwards.

Now, to maintain the equilibrium,

$N_2$ = 2g+3g

⇒ $N_2$ = 5g = 10 N

∴ The normal reaction force between block A (2kg) and block B (3kg) will be 10 N