Question

1) Calculate the density of a cuboid having mass 100g and dimension 4cm x 3cm x 1cm
ii) Calculate the pressure in pascal exerted by a face of 300N acting normally on an area of 20cm2?​

Answer 1

Explanation:

1) m = 100 g

v = 4 cm x 3 cm x 1 cm

v = 12 cm^3

$d = \frac{m}{v}$

Density = 100 / 12

Density = 8.33 g/cm^3

2) f = 300 N

A = 20 cm^2

A = 0.002 m^2

$p = \frac{f}{a}$

Pressure = 300 / 0.002

Pressure = 150000 Pa