Advertisements
Advertisements
प्रश्न
In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm2. If a force of 25 N is applied to the input piston, calculate weight/force on output piston.
उत्तर
Given:
A1 = 30 cm2 = 3 × 10−3 m2
A2 = 1500 cm2 = 0.15 m2,
F1 = 25 N
To find:
Weight on output piston.
Solution:
Using Pascal's law,
`"F"_1/"A"_1="F"_2/"A"_2`
∴ The force on the output piston,
F2 = `("F"_1 "A"_2)/"A"_1=(25 xx 0.15)/(3xx10^-3)`
= 25 × 50
= 1250 N
∴ The weight/force on the output piston is 1250 N.
APPEARS IN
संबंधित प्रश्न
A large He balloon of volume 1425 m3 is used to lift a payload of 400 kg. Assume that the balloon maintains constant radius as it rises. How high does it rise? [Take y0= 8000 m and `rho_"He"`= 0.18 kg m–3].
It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.
The unit of pressure is
Name two factors on which the pressure on a surface depends.
Why do camels or elephants have broad feet?
A sharp pin works better than a blunt pin. Explain the reason.
Calculate the pressure exerted on a surface of 0.5 m2 by a thrust of 100 kgf.
A boy weighing 60 kgf stands on platform of dimensions 2.5 cm x 0.5 cm. What pressure in pascal does he exert?
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.
If someone presses a pointed needle against your skin, you are hurt. But if someone presses a rod against your skin with the same force, you easily tolerate. Explain.
Consider the situation of the previous problem. Let the water push the left wall by a force F1 and the right wall by a force F2.
A drinking straw works on the existence of ______.
Match the following.
| 1. | Density | hρg |
| 2. | 1 gwt | Milk |
| 3. | Pascal’s law | `"Mass"/" Volume"` |
| 4. | Pressure exerted by a fluid | Pressure |
| 5. | Lactometer | 980 dyne |
Pressure is directly proportional to the area of contact.
Analogy
Broader straps: ______:: Thin needles: ______.
Give reasons why:
heavy trucks are fitted with 6 to 8 wheels
Intermolecular forces are stronger in ______.
The net force in a particular direction is called ______.
All flowing substances, both liquids, and gases are called ______.
Hot air is ______ dense than ordinary air.
Upthrust = weight of the fluid displaced – apparent weight of the object.
Assertion (A): Air gets thinner with increasing altitude.
Reason (R): The atmospheric pressure increases as we go up in mountains.
Assertion (A): A sleeping mattress is so designed that when you lie on it, a large area of your body comes in its contact.
Reason (R): This reduces the pressure on the body and sleeping becomes comfortable.
Define thrust.
