Question

the net acceleration of block of mass 4kg,kept on a smooth surface as shown in the figure....pls explain it fast​

Answer 1

Given:

4 kg mass under the influence of three forces.

To find:

Net acceleration of the object?

Calculation:

• Net force along X axis = 20 - 12 = 8 N.

• Weight = 4g = 40 N. So, 10 N force along Y axis will not be able to lift the mass from the floor.

So, net force of object will be the force along X axis :

$F = 8 \: N$

$\implies a = \dfrac{8}{m}$

$\implies a = \dfrac{8}{4}$

$\implies a = 2 \: m/ {s}^{2}$

So, acceleration of the mass is 2 m/s².

Answer 2

F = 20 - 12 = 8N

and,

m = 4kg

By using,

a = F/m

⇒ 8/4

⇒ 2m/s²