Question

a cubical box of mass 2kg with each side 2 cm is lying on the ground. Calculate the pressure exerted by the block on the ground​

Answer 1

25000Nm⁻² using rounded g figure

Step-by-step explanation:

The box is in cm. It needs to be converted into SI metres.

1m = 100cm

1cm = ( 1 / 100 )m

2cm = ( 1 / 50 )m

A = ( 1 / 2500 )m²

Assume that g = 10ms⁻¹. Use your own definition.

F = 10N

P = F / A

P = 10N( 2500 )m⁻²

25000Nm⁻²

Answer 2

Step-by-step explanation:

Given:

m = 2 kg

a = 2 cm = 0.02 m

g =9.8 m/s²

_______________

P - ?

Area of the cube:

S = a² = 0.02² = 0,0004 m²

Gravity:

F = m·g = 2·9.8 = 19.6 N

Pressure:

p = F / S = 19.6 / 0,0004 = 49 000 N/m²