Advertisements
Advertisements
प्रश्न
Figure shows a brick of weight 2 kgf and dimensions 20 cm x 10 cm × 5 cm placed in three different positions on the ground. Find the pressure exerted by the brick in each case.
उत्तर
(a) Weight of bricks = Thrust = F = 2 kgf
Area of base = `20/100 xx 10/100 = 1/50 "m"^2`
Pressure exerted P = `"F"/"A" = "2 kgf"/(1/50 "m"^2) = 100 "kgf m"^-2`
Or
Area of base = area of top L × B
20 cm × 10 = 200 cm2
P = `"Thrust"/"A" = "2 kgf"/200 "cm"^2 = 1/100 = 0.01 "kgf cm"^-2`
(b)
area of base = area of top
= 5 cm × 10 cm = 50 cm2
Pressure exerted = P = `"F"/"A" = "2 kgf"/"50 cm"^2 = 0.04`
P = 0.04 kgf cm-2
(c) Weight of brick
F = 2 kgf
Area of base = L × B
= 20 cm × 5 cm = 100 cm2
Pressure exerted = `"F"/"A" = 2/100 = 0.02 "kgf cm"^-2 `
APPEARS IN
संबंधित प्रश्न
Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill up to a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?
State the unit of thrust
Why is the bottom part of the foundation of a building made wider?
It is easier to cut with a sharp knife than with a blunt one. Explain.
A gum bottle rests on its base. If it is placed upside down, how does the thrust change?
A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will
Consider the statement given below and choose the correct option.
Assertion: Broad straps are used in bags.
Reason: Broad straps last for long.
A brick is kept in three different ways on a table as shown in figure. The pressure exerted by the brick on the table will be
 |
 |
 |
| (A) | (B) | (C) |
Pressure can be increased by decreasing the force.
What is an Artisan aquifer?
