Question

A block of mass 2 kg and dimensions 2 cm x 4 cm X 1 cm is kept on a table find the force applied by the block and also find the pressure applied by the surface whose area is 2 cm x 4 cm

Answer 1

The mass of the wooden block = 2 kg

The dimensions = 2 cm × 4 cm × 1 cm

Here, the weight of the wooden block applies a force on the table top.

That is,

Force F = m × g

F = 2 kg × 10 m s^-2

F = 20 N

Force = 20N

Area of a side = length × breadth

= 2 cm × 4 cm

= 8 cm². = 0.0008 m²

Area = 0.0008 m²

Pressure = Force/Area

Pressure = 20 N ⁄ 0.0008m²

Pressure = 25000 N m^-2.