Podcast
Questions and Answers
What is the force exerted by a fluid on an object in the opposite direction to the force of gravity?
What is the force exerted by a fluid on an object in the opposite direction to the force of gravity?
- Downforce
- Weight force
- Gravity pull
- Upthrust (correct)
Why does an iron nail sink when placed on the surface of water?
Why does an iron nail sink when placed on the surface of water?
- The upthrust of water is greater than the weight force of the nail.
- The nail is less dense than water.
- The weight force of the nail is greater than the upthrust of water. (correct)
- The nail has a lower volume than water.
What does the density of a substance indicate?
What does the density of a substance indicate?
- The force it exerts on other objects
- The pressure it can withstand
- The mass per unit volume of the substance (correct)
- Its weight per unit volume
Why does a cork float while an iron nail sinks in water?
Why does a cork float while an iron nail sinks in water?
What happens to the force exerted by fluid in all directions in a confined mass of fluid?
What happens to the force exerted by fluid in all directions in a confined mass of fluid?
What force allows an object to float in a fluid?
What force allows an object to float in a fluid?
Why does an object of density greater than that of a liquid sink in the liquid?
Why does an object of density greater than that of a liquid sink in the liquid?
What happens to the elongation of a rubber string when a stone suspended from it in air is immersed in water?
What happens to the elongation of a rubber string when a stone suspended from it in air is immersed in water?
Why is it difficult to hold a school bag with a thin and strong string strap?
Why is it difficult to hold a school bag with a thin and strong string strap?
What is buoyancy?
What is buoyancy?
In Archimedes' Principle, what happens when an object is placed on the surface of water?
In Archimedes' Principle, what happens when an object is placed on the surface of water?
What does it mean when the upthrust of water on an iron nail is less than the weight of the nail?
What does it mean when the upthrust of water on an iron nail is less than the weight of the nail?
What is the upward force exerted by water on an object immersed in it known as?
What is the upward force exerted by water on an object immersed in it known as?
What happens to the buoyant force when an object is pushed deeper into the water?
What happens to the buoyant force when an object is pushed deeper into the water?
What is required to keep an object completely immersed in water when released?
What is required to keep an object completely immersed in water when released?
Why doesn't an object stay immersed in water after it is released?
Why doesn't an object stay immersed in water after it is released?
Why doesn't a ship made of iron and steel sink in sea water?
Why doesn't a ship made of iron and steel sink in sea water?
What depends on the density of the fluid when an object is immersed in it?
What depends on the density of the fluid when an object is immersed in it?
