Application of Pascal's Law

Q.

In a hydraulic lift, used at a service station the radius of the large and small pistons are in the ratio of 20:1. What weight placed on the small piston will be sufficient to lift a car of mass 1500 Kg?

Q.

Young's modulus is the ratio of the logitudinal stress to___

1. Tensile strain

2. Tensile stress

3. Tangential strain

4. Longitudinal strain

Q.

Name two applications of Pascal's law.

Q.

Explain the principle of a hydraulic machine. Name two devices which work on this principle.

Q.

(a) The diameter of neck and bottom of a bottle are 2 cm and 10 cm respectively. The bottle is completely filled with oil. If the cork in the neck is pressed in with a force of 1.2 kgf, what force is exerted on the bottom of the bottle ? (b) Name the law/principle you have used to find the force in part (a)

Q.

Explain the working of a hydraulic brake with a simple labelled diagram.

Q.

Water is kept in a beaker of radius 5.0 cm. Consider a diameter of the beaker on the surface of the water. Find the force by which the surface on one side of the diameter pulls the surface on the other side. Surface tension of water = 0.075 N m^-1.

1. 0.75 N

2. 7.5 × 10^-4 N

3. 7.5 × 10^-3 N

4. 7.5 × 10^-2 N

Q.

Name and state the principle on which a hydraulic press works. Write one use of the hydraulic press.

Q.

Two cylindrical vessels fitted with pistons A and B of area of cross section 8 $c{m}^2$ and 320 $c{m}^2$ respectively, are joined at their bottom by a tube and they are completely filled with water. When a mass of 4 kg is placed on piston A, find : (i) the pressure on piston A, (ii) the pressure on piston B, and (iii) the thrust on piston B.

Q.

Draw a simple diagram of a hydraulic jack and explain its working.

Q.

The areas of pistons in a hydraulic machine are 5 $c{m}^2$ and 625 $c{m}^2$. What force on the smaller piston will support a load of 1250 N on the larger piston ? State any assumption which you make in your calculation.

Q.

the diameter of neck and bottom of a bottle are 2cm and 10cm respectively. the bottle is completely filled with oil.if the cork in the neck is pressed in with a force of 1.2kgf, what will be the force exerted on the bottom of the bottle

Q.

What is the function of (a) press plunger and (b) pump plunger in a hydraulic press ?

Q.

We are able to suck cold drink through a straw on account of_________

Q.

One pascal is the pressure generated by

Q.

The principle involved in the pressing of bales of cotton by a hydraulic press __________

Q.

How can we prepare a hydraulic jack modle for our physics project ? Please

Q.

The hydraulic brakes used in automobiles are based on:

1. Newtons second law of motion.

2. Law of floatation

3. Pascals law

4. Law of gravitation

Q. what is pascal law and hydraulic machines?

Q. Which of the following are uses of hydraulic press?

1. Pressing cotton bales.
2. Extracting juice from sugarcane.
3. Squeezing oil.
4. Engraving monograms on goods.

Q.

What causes the change in motion and change of state of motion?

1. Pressure

2. Force

3. Atmospheric pressure

4. Fulcrum

Q. Two cylindrical vessels fitted with pistons A and B of areas of cross section $8{\text{cm}}^2$ and $400{\text{cm}}^2$ respectively, are joined together using a tube at their bottoms. The cavity is then filled with water completely. Which of the following statements are true, if a mass of $2.5\text{kg}$ is placed on the piston A?

1. The pressure acting on the piston A = $3,125{\text{kgf m}}^{-2}$
2. The pressure acting on the piston B = $3,125{\text{kgf m}}^{-2}$
3. The pressure acting on the piston A = $15,625{\text{kgf m}}^{-2}$
4. The thrust acting on the piston B = $125\text{kgf}$

Q. derivation of pushing or pulling a roller is easier explain with hand written

Q.

The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in three vessels. The force on the base will be

1. Maximum in vessel A

2. Maximum in vessel B

3. Maximum in vessel C

4. Equal in all the vessels

Q.

State any four uses of hydraulic press.

Q.

Give the uses of a hydraulic press?

Q. In the given system, if we change $A_1$ into $5A_1$ and $F_1$ into $F_1/2$, then the pressure at B piston changes from $P$ to $P_0$. Calculate the ratio of $P$ and $P_0$.

1. $1:5$
2. $5:1$
3. $10:1$
4. $1:10$

Q.

A increase in length of a rope by pulling it from either side is an example of?

1. Tensile stress

2. Shear stress

3. Bulk modulus

4. Tangential strain

Q. Hydraulic jack works according to..........(Pascal's, Newton's) law.

Q. In hydraulic machine, the effort applied is more than the output.

1. True
2. False