Given: F = 300 N; `"A" = 30 " cm"^2 = 30/(100xx100)"m" ^2 = 30xx10^-4 "m"^2`
To Find: Pressure
`therefore "P" = "F"/"A"`
`= 300/(30/(100xx100)`
` = (300xx100xx100)/30`
= 100000
= 105 Pa
Calculate the pressure in pascal exerted by a force of 300 N acting normally on an area of 30 cm2.
Given: F = 300 N; `"A" = 30 " cm"^2 = 30/(100xx100)"m" ^2 = 30xx10^-4 "m"^2`
To Find: Pressure
`therefore "P" = "F"/"A"`
`= 300/(30/(100xx100)`
` = (300xx100xx100)/30`
= 100000
= 105 Pa
Explain why Hydrostatic pressure is a scalar quantity even though the pressure is force divided by area.
The unit of thrust is ..........
The unit of pressure is .........
When does a man exert more pressure on the floor: while standing or while walking?
A gum bottle rests on its base. If it is placed upside down, how does the thrust change?
Multiple Choice Question.
A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross-section of piston carrying the load is 2.25 × 10-2 m2. What is the maximum pressure the smaller piston would have to bear?
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 |
A brick is kept in three different ways on a table as shown in the following figure. The pressure exerted by the brick on the table will be
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| A | B | C |
If the same force is made to act on a larger area, the pressure ______.
Analogy
Broader straps: ______:: Thin needles: ______.