You visited us 1 times! Enjoying our articles? Unlock Full Access!

Thrust & Pressure

a 1 kgf = N n...

Question

(a) 1 kgf = N (nearly)

(b) Moment of force = $\times$ distance of force from the point of turning

(c) In a door, handle is provided from the hinges.

(d) The unit of thrust is

(e) Thrust is the force acting on a surface.

(f) Pressure is the thrust acting on a surface of area.

(g) The unit of pressure is

(h) Pressure is reduced if increases.

(i) Pressure in a liquid with the depth.

(j) The atmospheric pressure on earth surface is nearly

Open in App

Solution

(a) 1 kgf = 10 N (nearly).

(b) Moment of force = force $\times$ distance of force from the point of turning

(c) In a door, the handle is provided farthest from the hinges.

(d) The unit of thrust is Newton.

(e) Thrust is the normal force acting on a surface.

(f) Pressure is the thrust acting on a surface of the unit area.

(g) The unit of pressure is Pascal.

(h) Pressure is reduced if an area of surface increases.

(i) Pressure in a liquid increases with the depth.

(j) The atmospheric pressure on earth surface is nearly $10^{5}$ Pa.

Suggest Corrections

Similar questions

Write true or false for each statement :

(a) The S. I. unit of force if kgf.

(b) A force always produces both the linear and turning motions.

(d) Less force is needed when applied at a farther distance from the pivoted point.

(e) For a given thrust, the pressure is more on a surface of a large area.

(g) A man exerts the same pressure on the ground whether he is standing or he is lying.

(h) It is easier to hammer a blunt nail into a piece of wood than a sharply pointed nail.

(i) The S. I . unit of pressure is Pascal.

(j) Water in a lake exerts pressure only at its bottom.

(k) A liquid exerts pressure in all directions.

(l) Gases exert pressure in all directions.

(m) The atmospheric pressure is nearly $10^{5}$ Pa.

(n) Higher we go, greater is the air pressure.

(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

Statement 1: For the same load/force acting on two different surfaces, more pressure is developed on the surface with a smaller area.
Statement 2: Pressure is defined as thrust(force acting normally to the surface) per unit area.

Thrust exerted by atmospheric air on a unit area of earth's surface is called atmospheric pressure.

Q. Assertion :The pressure at a point is the ratio of force to the area on which force is acting. Reason: Pressure is the thrust acting per unit area.

Join BYJU'S Learning Program

Explore more

Thrust & Pressure

Standard VIII Physics

Join BYJU'S Learning Program