fluid dynamics

The effect of air resistance on projectile motion

In this post, we will find the effect of air resistance on projectile motion. We have seen that in the absence of air resistance, the trajectory or path followed by a projectile is a parabola and that the path depends only on the initial speed and angle of projection. But in the real world, all […]

What Is Bernoulli’s Principle? Explain it with airplane wing and sails example

Bernoulli’s principle is named for Daniel Bernoulli, who presented it in 1738, and it concerns the relationship between pressure and flow speed in fluids. In its simplest form, Bernoulli’s principle states that increasing flow speed in fluids corresponds to decreasing pressure, and vice versa. Application of Bernoulli’s Principle – Airplane wings and Sails Airplane wings […]

Solution to problems – class 9 physics – Set 1 Q 60

Problem Statement 60) A metallic sphere of mass 2 kg and volume 2.5 x 10-4 m3 is completely immersed in water. Find the buoyant force exerted by water on the sphere. Density of water = 1000 kg/m3 Solution Volume of the water displaced = volume of the completely immersed sphere=2.5 x 10-4 m3 Mass of […]

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