If the mass of the block is 2 kg- then the values of T is -A- 20 NB- 60 NC- 40 ND- 30 N

The correct option is D 30N Weight of the block = mg = 2 × 10 = 20N In equilibrium, net force acting on the block will be zero, i.e., If the block is at r ...

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Standard IX

Physics

Acceleration

If the mass o...

Question

If the mass of the block is 2 kg, then the values of T is :

30N

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20N

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60N

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40N

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Solution

The correct option is A
30N

Weight of the block = $m g$ = $2 \times 10$ = $20 N$

In equilibrium, net force acting on the block will be zero, i.e., If the block is at rest , then the forces acting upwards should be equal to the downward force.

Tension T is acting upwards and its weight and 10N force is acting downwards.
So,
$10 N + 20 N$ = T
$\Rightarrow T = 30 N .$

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