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Standard VII

Mathematics

Area of a Circle

The pressure ...

Question

The pressure due to a thrust of 1 N on a unit metre square area is

1 atm

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1 bar

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1 J

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1 Pa

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Solution

The correct option is D 1 Pa
1 N of thrust acting on a unit metre square area, results in a pressure of $1 {N m}^{- 2}$ or $1 Pa$ . The units of atm and bar are higher units of pressure, and joule (J) is not a unit of pressure, but of energy or work done.

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Similar questions

(a) S.I. unit of moment of force is :

(i) N (ii) N cm (iii) kgf m (iv) N m

(b) To obtain a given moment of force for turning a body, the force needed can be decreased by :

(i) applying the force at the pivoted point (ii) applying the force very close to the pivoted point

(iii) applying the force farthest from the pivoted point. (iv) none of the above.

(i) kgf (ii) kg (iii) g (iv) $m s^{- 1}$

(d) The unit of pressure is :

(i) $N \times m$ (ii) kgf (iii) $N m^{- 2}$ (iv) $k g f m^{2}$

(e) Thr pressure and thrust are related as :

(i) Pressure = Thrust (ii) Pressure = Thrust $\times$ Area

(iii) Pressure = Thrust / Area (iv) Pressure = Area / Thrust

(f) A body weighing 5 kgf, placed on a surface of area 0.1 $m^{2}$ , exerts a thrust on the surface equal to :

(g) The feet of lizards act like :

(i) moving pads (ii) drilling pads (iii) suction pads (iv) none of the above

(h) The pressure exerted by a liquid is due to its :

(i) weight (ii) mass (iii) volume (iv) area

(i) The pressure inside a liquid increases with :

(i) increase in depth (ii) decrease in depth (iii) decrease in density (iv) none of the above

(j) The atmospheric pressure at sea level is nearly:

(i) 10 Pa (ii) 100,000 Pa (iii) 100 Pa (iv) 10,000 Pa

(k) Nose bleeding may occur at a high altitude because :

(i) the atmospheric pressure decreases (ii) the oxygen content of the atmosphere decreases

(iii) the atmospheric pressure increases (iv) there are strong air currents at the high altitude

Q. The pressure due to a thrust of 1 N on a unit metre square area is

Q. A 60 N force acts on a 3 metre square area, the pressure applied on the area is:

Q. What is the pressure due to a thrust of 800 N acting on an area of

2 m^{2}

A force of 400 N acts on a surface of area 25 square cm. Calculate thrust and pressure. Calculate the changed pressure if the force now is made to 600 N.

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The pressure due to a thrust of 1 N on a unit metre square area is

The correct option is D 1 Pa1 N of thrust acting on a unit metre square area, results in a pressure of 1 N m−2 or 1 Pa. The units of atm and bar are higher units of pressure, and joule (J) is not a unit of pressure, but of energy or work done.

The correct option is D 1 Pa
1 N of thrust acting on a unit metre square area, results in a pressure of $1 {N m}^{- 2}$ or $1 Pa$ . The units of atm and bar are higher units of pressure, and joule (J) is not a unit of pressure, but of energy or work done.