Recent content by Juliusz

Ah, I think I see. So it can be written like this?

Homework Statement Ball A is dropped from rest from a building of height H exactly as ball B is thrown up vertically from the ground. When they collide A has twice the speed of B. If the collision occurs at height h, what is h/H? Homework Equations (I would type them out put I can't format...

I don't know what formula you quoted, but the one attached in my image is the same as you just wrote

Is this the formula you are referring to?

This is not the first time that a "correct" answer is actually wrong. Thank god for forums like these, otherwise I would break my head thinking about what I did wrong.

The tip. That's the problem with translating problems from a different language.

Homework Statement Hydroelectric power station's turbine has a diameter of 7.5m, and a rotation frequency of 94 rotations per minute. What is the turbine's blades acceleration? P.S. This is translated from another language Homework Equations a=4π2Rn2 Where n=rotational frequencyThe Attempt at...

I get it now, thanks! The body fell 80 meters in the first 4 seconds, then another 240 meters (which is 320-80) in the following 4 seconds. And then, in the last 4 seconds it fell 400 meters, which is 720-320m. Thanks for the help everyone!

They mean the distance fallen by the body after a certain amount of time

t1=12 t2=8 t3=4 x(t)=a*t2/2 x(t1)=10*122/2=720 x(t2)=10*82/2=320 x(t3)=10*42/2=80 I think I did what you two were suggesting, but I still got a bad answer for t2. Maybe I made a wrong assumption somewhere?

I looked at the answer, ant it is 80m, 240m, 400m. I can't see how I can figure that out by knowing the total time

Is this correct? If so, what's next? x(t)= x0+V0+at2/2 t=√2x/√a t=12.12 Also, how do I format division as a fraction here? Thanks!

Homework Statement A body is falling from a height of 720m. Divide this distance into three parts so that the body would overcome all parts in the same time. P.S (This is translated from a different language) Homework Equations x(t)= x0+V0+at2/2 v(t)=V0+atThe Attempt at a Solution I made an...