Last seen: Nov 14, 2021
A ship made of iron and steel is a hollow object which contains a lot of air in it. Due to the presence of a lot of air in it, the average density of ...
The foundations of buildings and dams are laid on a large area of ground so that the weight of the building or dam produces less pressure on the groun...
A nail has a pointed tip, so that when it is hammered, the force of hammer is transferred to a very small area of wood creating a large pressure which...
Flat shoes have greater area in contact with the soft sand as compared to heels. Due to this, there is less pressure on soft sand because of which the...
When a person stands on a cushion then only his two feet (having small area) are in contact with the cushion. Due to this the weight of man falls on a...
Snow shoes stop us from sinking into soft snow because due to large area of snow shoes, our weight is spread over a large area of the snow producing s...
When a man is walking, then at one time only one foot is on the ground. Due to this, the force of weight of man falls on a smaller area of the ground ...
The tip of the sewing needle is sharp so that due to its sharp tip, the needle may put the force on a very small area of the cloth, producing a large ...
A wide steel belt is provided over the wheels of an army tank so that they exert less pressure on the ground and do not sink into it.
Concrete or wooden sleepers are kept below the railway line so that the weight of passing train is spread over a large area of ground and the track ma...
A sharp knife cuts objects easily because due to its very thin edge, the force of our hand falls on a very small area of the object producing large pr...
School bags have wide straps so that their weight may spread over a large area of shoulder producing less pressure on the shoulder.
A piece of steel sinks in water because steel is denser than water. However, a steel ship is a hollow object made of steel and contains a lot of air i...
A piece of glass sinks in water but it floats in mercury because density of glass is more than that of water but less than that of mercury.
An iron nail sinks in water but it floats in mercury because density of iron is more than that of water but less than that of mercury.
Big boulders weight much less while in water and as such are easily moved by the flood.
As more and more volume of our body is immersed in water, the apparent weight of the body goes on decreasing and the body seems to become lighter. Thi...
As more and more volume of the solid object is immersed in the liquid, the upward ‘buoyant force’ also keeps on increasing. When the object is complet...
A mug full of water appears light as long as it is under water because buoyant force acts on it which reduces its effective weight and makes it appear...
The force acting on a body perpendicular to its surface is called thrust. The SI unit of thrust is newton (N).