Advertisements
Advertisements
Question
A piece of wood if left under water comes to the surface. Explain the reason.
Solution
A piece of wood if left under water comes to the surface of water because the upthrust on body due to its submerged part is equal to its own weight.
APPEARS IN
RELATED QUESTIONS
An object of weight 200 N is floating in a liquid. What is the magnitude of buoyant force acting on it ?
State the laws of liquid pressure.
The S.I. unit of pressure is :
The pressure P1 at the top of a dam and P2 at a depth h form the top inside water (density p) are related as :
The area of base of a cylindrical vessel is 300 cm2. Water (density= 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate : (a) the pressure and (b) the thrust of water on the base. (g = 10m s-2.
A simple U tube contains mercury to the same level in both of its arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in the other arm?
Given : density of mercury = 13.6 x 103 kg m-3 and density of water = 103 kg m-3.
A small block of wood is completely immersed in (i) water, (ii) glycerine and then released. In each case, What do you observe? Explain the difference in your observation in the two cases.
A metal solid cylinder tied to a thread is hanging from the hook of a spring balance. The cylinder is gradually immersed into the water contained in a jar. What changes do you expect in the readings of the spring balance? Explain your answer.
How is thrust different from pressure?
