Pressure

Q.

Calculate the pressure developed by a force of 50 N acting on an area of ${10m}^2$.

1. 10 Pa

2. 5 Pa

3. 15 Pa

4. 20 Pa

Q. A force of 1200N acts on the surface of area 10 cm² normally.What would be the pressure and thrust on the surface

Q.

Select the correct relation(s) for pressure.

1. Pressure is inversely proportional to force applied.

2. Pressure is directly proportional to force applied.

3. Pressure is inversely proportional to the area.

4. Pressure is directly proportional to the area.

Q.

Why does motorcar truck have much wider tyres

Q. A force of 100N acts on the surface of area 10cm2 normally. What are the thrust and pressure on the surface?

Q.

Why building have wide foundation

Q.

Examples for pressure exerting in less area and the pressure exerting larger area

Q. Why is depression much more when a man stands on the cushion than when he lies down on it?

Q.

Why nails have pointed tip

Q. A cork is floating on the surface of water. The buoyant force acts in the direction.

1. upward
2. downward
3. parallel

Q.

Define pressure. Why is it difficult to hold a school bag having a strap made of a thin and strong string? [3 MARKS]

Q.

Which of the following statements is true?

1. All of these

2. A fluid exert pressure in all directions.

3. The substance which can flow easily are called fluids.

4. All the liquids and gases are called fluids.

Q.

One pascal and one newton per meter square are same things.

1. True
2. False

Q.

What is the pressure if a 20 N force is applied over an area of ${2cm}^2$?

1. Pa

2. Pa

3. Pa

4. Pa

Q.

Fig. shows a container filled with water. Which of the following statements is correct about the pressure of water?

1. $PressureA>PressureB>PressureC$

2. $PressureA=PressureB=PressureC$

3. $PressureA<PressureB>PressureC$

4. $PressureA<PressureB<PressureC$

Q. Which of the following object exerts the greatest pressure on the floor?
(All the given objects have the same mass)

1. Figure C
2. Figure A
3. Figure D
   
4. Figure B

Q.

A cube of mass 1kg with each side of 1cm is lying on the table. find the pressure exerted by the block on the table. Take g = 10 $m/s^2$.

1. 3 x 10 ⁶ pa
2. 1 x 10 ⁶ pa
3. 2 x 10 ⁶ pa
4. 4 x 10 ⁶ pa

Q. Which of the following statements is correct about liquid pressure?

1. Liquid pressure increases with decreasing depth.
2. Liquid pressure decreases with increasing depth.
3. Liquid pressure doesn’t depend on depth.
4. Liquid pressure increases with increasing depth.

Q. Calculate the pressure produced by a force of 1200N acting on an area of 4.0 cm²

Q.

An object exerts a force F on a surface of surface area A. The pressure P acting on the surface is given by

1. P = F/A

2. P = FA

3. P = A/F

4. P = F/A²

Q.

Explain the formation of fronts and depression.

Q. The thrust $F$ is exerted on area $2A$ and thrust $3F$ is exerted on area $\frac{A}{2}$. Find the ratio of pressure exerted.

1. $1:2$
2. $1:3$
3. $1:9$
4. $1:12$

Q.

A drawing pin is pierced in a wooden table with a force of 5N.Calculate the pressure exerted by the pin on the wooden table if the area is 0.02mm

Q.

The same amount of pressure is applied on two different objects with different surface areas. In this scenario which of the following statements is correct?

1. Both the surfaces experience the same force.

2. The surface having more surface area experiences more force.

3. The surface having less surface area experiences more force.

4. Force is zero in both cases.

Q. Which of the following statement is not true about pressure?

1. Pressure is a vector quantity.
2. Pressure is a scalar quantity.
3. Pressure is the thrust per unit area.
4. Pressure is the perpendicular force per unit area.

Q.

Find the excess pressure inside a mercury drop of radius 2.0 mm. The surface tension of mercury = 0.464 N/m

1. 464 N/m

2. 928 N/m²

3. 464 N/m²

4. 928 N/m

Q.

What causes winds and cyclones?

1. The difference in air pressure.

2. The difference in temperature.

3. The difference in both temperature and pressure.

4. The depends on the weather.

Q.

Define Pressure? How is thrust different from Pressure?

Q. The density of atmosphere on earth's surface is about $1.3{\text{kg m}}^{-3}$ and the pressure is $1\text{atm}$. If the atmosphere had uniform density, same as that observed from the earth's surface, what would be the height of the atmosphere to exert the same pressure as on the surface?

Would this height be taller or shorter than the Mt. Everest?
(Take necessary assumptions and approximations) $\left[5\text{marks}\right]$

Q.

A force of 50N is applied on an area of $2m^2$. Pressure applied to the area is equal to ___ Pa.