Advertisements
Advertisements
प्रश्न
A hammer exerts a force of 1.5 N on each of the two nails A and B. The area of cross section of tip of nail A is 2 mm2 while that of nail B is 6 mm2. Calculate pressure on each nail in pascal.
Advertisements
उत्तर
Force exerted , F = 1.5 N
Area of cross - section of tip of nail A , a1 = 2 mm2 = `2 xx 10^-6` m2
Area of cross - section of tip of nail B , a1 = 6 mm2 = `6 xx 10^-6 "m"^2`
Pressure on nail A = `"F"/"a"_1 = 1.5/(2 xx 10^-6) = 7.5 xx 10^5` pascal
Pressure on nail B = `"F"/"a"_2 = 1.5/(6 xx 10^-6) = 2.5 xx 10^5` pascal
संबंधित प्रश्न
Name the force which makes heavy objects appear light when immersed in a liquid.
A body floats in a liquid when its weight becomes equal to the weight of the liquid displaced by its submerged part.
When a boat is partially immersed in water, it displaces 600 kg of water. How much is the buoyant force acting on the boat in newtons ? (g = 10 m s-2)
What is the law of floatation?
Explain why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
A dam has broader walls at the bottom than at the top. Explain.
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
A body will experience minimum upthrust when it is completely immersed in :
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
Is thrust a scalar or vector quantity?
