Dhiren M Doshi Solutions for Chapter: Floatation, Exercise 1: Check Your Progress

$\mathrm{Pa}$ is the SI unit of

To increase the effect of force, the area on which it acts 

The pressure acting on a body and area of contact are

The truck with a heavy load will move more swiftly if it is fitted with

Give reasons for the following: The cutting edge of a knife is sharpened.

Give reason of the following: A school bag has a wide shoulder strap.

Show by an activity that the effect of forces of the same magnitude on different areas are different.

A $5 \mathrm{kg}$ wooden block is kept on top of a table. Its dimensions are $30 \mathrm{cm}\times 20 \mathrm{cm}\times 5 \mathrm{cm}$. Find the pressure exerted by the wooden block on the tabletop, if it is made to lie on the tabletop with its side of dimensions: $30 \mathrm{cm}\times 5 \mathrm{cm}.$