Question

A 2cm cubical block of mass 2kg is lying on the ground. What is the pressure exerted by the block on the ground?

Answer 1

Answer:

• Pressure = 4.9 x 10⁴Pa

Step-by-step explanation :

Given, mass of the block, m = 2 kg

Side of cube, a = 2 cm

= 2/100 m = 0.02 m

So, Area of the lower face of the cube,

A = a² = 0.02 x 0.02 = 4 x 10¯⁴ m²

We know that,

Weight of the block, W = mg

= 2 x 9.8

= 19.6 kg m s¯²

= 19.6 N

Now, we know that

P = Force /Area = Weight /Area

Substituting these values, we get

P = 19.6/ 4 x 10¯⁴

= 4.9 x 10⁴ N m) ¯²

= 4.9 x 10⁴Pa. (∵ 1 N M² = 1 Pa)

Answer 2

Refer the attachment above ..

Hope it Helps !!