Recent content by DanicaK

Actually I am university student.

It does not effect the momentum.

Homework Statement a ball falls in a truck loaded with sand with velocity v having horizontal and vertical component. The angle under which it enters the truck is α, the mass of the ball is m of the track loaded with sand is M. What happens with the momentum after the collision? The...

But the condition is the ball to float. V(immersed) is the volume of the ball that is under water or the displaced water. And when i did the equation: weight of water displaced by the ball is equal to the weight of the ball i need the volume of water displeased.

Thanks a looot. :D

ΟΚ, i did the following: P=mg P=g(ρ1+ρ)/(V1+V2) F(arch)=ρ2gV(immersed) P=F(arch) g(ρ1+ρ)/(V1+V2)=ρ2gV(immersed) (ρ1+ρ)/(V1+V2)=ρ2V(immersed) Again i have two unknowns:V(immersed); ρ

p1+ρgh+ρv1^2/2=p2+ρgh+ρv2^2/2 p1=F/A1 we cancel ρgh p2=p(atm) ρv1^2/2=0 because the opening is very smal so, F/A1=p(atm)+ρv2^2/2 A1v1=A2v2 Now I don't know how to use the volume and the time. And how to find d in order to calculate the work.

I tried to find the volume that is immersed when the ball has no hollow and when it has, but this didn't help me because i thing the volume of the immersed part with the substance in it should be given. I am very confused. The solution in the book is ρ=ρ1+(ρ2-ρ1)R/r^3

A syringe is filled with water and placed in horizontal position. How much work should we do pressuring the clip with a constant force in order to remove the water from the syringe in a time t. The volume of the water in the syringe is V, the cross-sectional area of the opening is S1 and is very...

Hollow spherical ball with inner and outer radius R and r respectfully is made of a material with density 1. The ball is swimming in a liquid with density 2. How much should be the density of the substance that will fill the hollow ball so that it can float? help pls

OK, but i don't understand neither how the moment of inertia of a thin rod is found. Can you explain me please

How do we find out that the moment of inertia about the hinges of a door with a width w is I=M w2/3. I find it like this in a book and also in table for the moments of inertia of homogeneous rigid objects with different geometries (about a long thin rod with rotation axis trough end). Thank you.

1)Two objects are at rest on a frictionless surface. Object 1 has a greater mass than object 2. When a constant force is applied to object1, it accelerates trough distance d. The force is removed from object 1 and is applied to object 2. At the moment when object 2 has accelerated trough the...

Modern physics - title.

Musa Baş, Halit Cokşun, Murat Baycan :D