if an iron cube of volume 400cm3 is immersed in water,the upthrust will be?
V*D = 400cm^3 * 0.998g/cm^3 = 399.2 Grams = 0.399 kg
F = M*g = 0.399 * 9.8 = 3.91 N. =
Upthrust
An iron cube of volume 800cm is totally Immersed in water calculate the upthrust
To determine the upthrust experienced by the iron cube when immersed in water, we need to consider the concept of buoyancy.
Buoyancy is the upward force exerted on an object submerged in a fluid. It is equal to the weight of the fluid displaced by the object. In this case, the fluid is water.
To calculate the upthrust or buoyant force, we can use Archimedes' principle, which states that the buoyant force acting on a submerged object is equal to the weight of the fluid displaced by the object.
1. Find the weight of the iron cube:
- The volume of the cube is given as 400 cm³.
- Assume the density of iron is 7.8 g/cm³ (you can look up the density of iron for more accuracy).
- The mass of the iron cube can be calculated using the formula: mass = density × volume.
- mass = 7.8 g/cm³ × 400 cm³.
- Convert the mass from grams to kilograms (1 kg = 1000 g).
2. Find the weight of the water displaced:
- The weight of water displaced is equal to the weight of the iron cube (since the object is fully submerged).
- Use the formula: weight = mass × gravitational acceleration.
- The gravitational acceleration on Earth is approximately 9.8 m/s².
3. Finally, the upthrust or buoyant force is equal to the weight of the water displaced.
Remember, the upthrust force is exerted in the opposite direction to the force of gravity. If you need the net force acting on the object, you can subtract the weight of the iron cube from the upthrust force.
By following these steps and performing the necessary calculations, you can determine the upthrust experienced by the iron cube when immersed in water.