Calculating the buoyant force on a cube

AI Thread Summary
To calculate the buoyant force on a submerged cube with a volume of 0.78 m3 and a mass of 328 kg, Archimedes' Principle is applied. The buoyant force is equal to the weight of the fluid displaced by the cube, which can be determined using the formula: buoyant force = volume of fluid displaced × density of fluid × gravitational acceleration. The weight of the cube is also relevant, as it helps in understanding the net forces acting on the object. The discussion emphasizes the importance of understanding these fundamental principles in solving buoyancy-related problems. Proper application of these concepts is essential for accurate calculations in physics.
RichardCash
Messages
1
Reaction score
0

Homework Statement


A cube, with a volume of 0.78 m3 is submerged in a swimming pool. What is the buoyant force acting on the object if it has a mass of 328 kg?


Homework Equations





The Attempt at a Solution

 
Physics news on Phys.org
Hello? What is the weight of the cube? Haven't you studied Archimedes Principle?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top