# Physics

posted by .

A brick weighs 15.0 N and is resting on the ground. Its dimensions are 0.203 m 0.0890 m 0.0570 m. A number of the bricks are then stacked on top of this one. What is the smallest number of whole bricks (including the one on the ground) that could be used, so that their weight creates a pressure of at least one atmosphere on the ground beneath the first brick? (Hint: First decide which face of the brick is in contact with the ground.)

pressure = force / area
density = Mass / volume
1atm = 101300 Pa

• Physics -

pressure= total weight/area

I will be happy to critique your thinking.

• Physics -

well what i did was i found the area of the face to be .203 * .0890..then i divided 15/ Area to get pressure then i did 101300 / pressure to get number of bricks..this doesnt work

• Physics -

smallest number of bricks will mean the greatest pressure, or smallest area. The side of the brick giving the smallest area will be .0890 x .0570, wouldn't it? The weight on that face gives the greatest pressure.

• Physics -

oo ok cool thanks

## Similar Questions

1. ### Physics

A typical brick has dimensions of 20.0 cm by 10.0 cm by 5.0 cm and weighs 20.0 N. How does the pressure exerted by a typical brick when it is resting on its smallest side compare to the pressure exerted when it is resting on its largest …
2. ### fluid mechanics

A brick weighs 15.0 N and is resting on the ground. Its dimensions are 0.203 m multiplied by 0.0890 m multiplied by 0.0570 m. A number of the bricks are then stacked on top of this one. What is the smallest number of whole bricks (including …
3. ### maths

A brick wall is built by using 2 bricks less in each layer than in the previous one. The wall has m layers and in total 21m+40 bricks are used. If the top layer has only 4 bricks, determine:A) the value of m b) the total number of …
4. ### math

bricks are stacked in 20 rows such that each row has a fixed number of bricks more than the row above it. the top row has 5 bricks and the bottom row 62 bricks. how many bricks are in the stack?
5. ### physics

A brick weight 17.8N and is resting on the ground. Its dimensions are 0.203mx0.089mx0.0570m. A number of the bricks are then stacked on top of this one. What is the smallest number of whole bricks (including the one on the ground) …
6. ### general physics

A solid concrete block weighs 160 N and is resting on the ground. Its dimensions are 0.400 m x 0.240 m x 0.0950 m. A number of identical blocks are stacked on top of this one. What is the smallest number of whole bricks (including …
7. ### physics

the mass of a brick is 2.5 kg. its dimensions are 10cmx5cmx2cm. find the pressure of the brick exerts on the ground if it is resting on a. 10cmx5cm base and b. 5cmx2cm base
8. ### Physics

Four bricks are to be stacked at the edge of a table, each brick overhanging the one below it, so that the top brick extends as far as possible beyond the edge of the table. *The construction in stable equilibrium, bricks must extend …
9. ### Physics

A builder wants to build a corbeled arch, based on the principle of stability, what minimum number of bricks, each 0.30 m long, is needed if the arch is to span 1.0 m?
10. ### physics

there are 1000 bricks and when they are stacked neatly they measure 2m by 1m by 1m. What is the volume of the stack?

More Similar Questions