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...
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.
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!
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?
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...