Question

A Rectangle block has a weight of 500N. It has 100cm X 50cm X 10cm dimensions. If the block is kept horizontally on the table, calculate the least and the maximum pressure it can exert on the table

Answer 1

Answer:

Weight,W = 500N

In this case the weight is equal to force acting on the top of the table in the downward direction.

Weight = Force,

OR

F=500N

We know the formula of pressure,

P = Force/area.

Now it can be seen that pressure is inversely proportional to area, which means if area is small than pressure will be huge and if the area is large than pressure will be small.

So for part(I)

Maximum pressure is supposed to be calculated which means that we need small surface area of that rectangular box in contact with the table.

So dimensions which will give a small surface surface Area=area of a rec.. side=b×h

-50 × 10

-500cm

=5m

Now P=F/A

P=500/5

Maximum pressure=100pascal/pa

for part (ii)

minimum pressure this means we need large surface area-

dimensions which will give large surface area

surface Area=area of a rec.. side=L×B

100×50

5000cm

50m

Now, P=F/A

P=500/50

P=10pascal/pa

Minimum pressure=10pascal/pa