Question

A rectangular wooden block has the length, breadth and height of 40 cm, 35 cm and 10 cm, respectively.

This wooden block is kept on ground in three different ways, turn by turn. Which of the following is the

correct statement about the pressure exerted by this block on the ground?
a- The maximum pressure is exerted when the length and breadth form the base

b- The maximum pressure is exerted when the length and height form the base

c- The maximum pressure is exerted when the breadth and height form the base

d- None of the Above​

Answer 1

Answer:

when the breadth and height form the basie

Answer 2

Given :

• Length = 40 cm
• Breadth = 35 cm
• Height = 10 cm

Method :

Pressure acting upon a body is given by,

$\dag\boxed{\sf{P = \dfrac{F}{A}}}$

here ,

• P = pressure
• F = force
• A = area

From this, we can conclude that pressure is directly proportional to force and inversely proportional to the area of the body.

Now let us verify each statement.

a) The maximum pressure is exerted when the length and breadth form the base

⇒ Area = length x breadth

⇒ Area = 40 x 35

⇒ Area = 1400 sq cm [ Minimum pressure ]

b) The maximum pressure is exerted when the length and height form the base

⇒ Area = length x height

⇒ Area = 40 x 10

⇒ Area = 400 sq cm

c ) The maximum pressure is exerted when the breadth and height form the base

⇒ Area = breadth x height

⇒ Area = 35 x 10

⇒ Area = 350 sq cm [ Maximum pressure ]

Hence,

The answer is option C.