upthrust force&immersed body

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An iron needle sinks in water but a huge ship floats on the surface of water. All objects whether inside the liquid (or fluid) or partially inside, appear to be lighter than in air. This is because liquids (or fluids) exert upward force on the immersed object. This is called the upth..

Buoyancy - A cork is pushed down into water kept in a glass. We find that as soon as it is released, the cork rises on its own and comes to the surface. Pressure pushes cork upwards To keep it beneath the surface of water, we have to exert downward force. This means that, when the cork is..

Archimedes' Principle - An iron needle sinks in water but a huge ship floats on the surface of water. All objects whether inside the liquid (or fluid) or partially inside, appear to be lighter than in air. This is because liquids (or fluids) exert upward force on the immersed object. This..

Stokes' law explains why the speed of a raindrop is less than a freely falling body with constant velocity, from the height of clouds. The same law helps a man coming down with the help of a parachute, to slow down. Terminal velocity refers to the constant velocity, acquired by a freely fallin..

A submarine sinks by taking water into its buoyancy tanks. Once submerged, the upthrust is unchanged, but the weight of the submarine increases with the inflow of water and it sinks faster. Compressed air is used to blow water out of the tanks when it has to resurface. (An atomic sub..

Weight of the body =mg where r is the radius of the body, r is density, g is the gravity due to upward viscous drag F v = 6 ph vr (Stokes' law). where h is coefficient of viscosity, v is the velocity of body, r is radius of the body. Upthrust or Buoyant force F T = w..

Submarine - The submarine is another application of 'Archimedes Principle'. On surface, the submarine floats, with its conning tower and most of the deck, being clear of the wate..