Why does a block of wood held under water rise to the surface when released ?
Since the weight of the block of wood is not heavier the weight of an equivalent volume of water. So when it is totally submerged in water, the upward buoyant force on it is more than the gravitational force on it downward. Consequently, the block rise to the surface.
Related Articles Why does a block of plastic released under water come up to the surface of water?
To find the Surface Tension of Water by Capillary Rise Method
What kind of friction comes into play:(a) when a block of wood kept on table moves slowly?(b) when a block of wood kept on table just tends to move (or slip)?(c) when a block of wood kept on cylindrical iron rods moves?
How does wood float in the water?
Explain why, if a stone held in our hand is released, it falls towards the earth.
Why does a matchstick light when we strike it on a rough surface?
Why is water poured to extinguish burning wood?
A mug full of water appears light as long as it is under water in the bucket than when it is outside water. Why ?
The evaporation of water increases under the following conditions :(a) increase in temperature, decrease in surface area(b) increase in surface area, decrease in temperature(c) increase in surface area, rise in temperature(d) increase in temperature, increase in surface area, addition of common salt
(a) With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.(b) Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.
When coal is burned partially, what are the products released, and why?
Why does the Sun, rise in the East and set in the West?
(a)Why is sodium kept immersed in kerosene oil?(b)Why is white phosphorus kept immersed under water? (c)Can we keep sodium immersed under water? Why?
Is there a case when finally block does not execute in Java?
Giving reasons state the reading on a spring balance when it is attached to a floating block of wood which weighs 50 g in air.
Kickstart Your Career
Get certified by completing the course
Get Started