Recent content by SherBear

Homework Statement Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 270 kg. Its maximum angular velocity...

Ok I understand. Thank you for all your time and patience. =-)

.8kg(0) When two things collide and are elastic do they go separate ways if elastic or the same way? That's why I didn't make .3 m/s negative.

Before the crash, Cart A is at rest and cart B is on the right side moving toward cart A. (moving toward cart A negatively) After the crash, Cart A would be moving to the left if cart B crashed into it, and cart B would bounce off and move the other way to the right? Taking the Conservation...

I have it figured out, I will post what I have after school

typo vib=0 is Vao = 0, because initially it is at rest

Is it 2R - 1/2 R ? 20-5 = 15m ?

How can I go through those steps if it only gives me the diameter?

Ok, thank you. Any idea about the height of the hill ?

Ma Vao + Mb Vbo = MaVaf + Mbf Vbf this is the same as Ma Vai + Mb Vbi = Ma Vaf + Mbf Vbf and I haven't changed the values, they are still Here is what is given: vi=0 Mass of A=.8kg I call it Ma Mass of B=1.6 kg I call it Mb Vbo=1.0 m/s vib=0 vfb=.3 m/s

They are the same and I don't know

No idea Haruspex?

I forgot to add the third part, there is a rider on the bottom of the loop in a cart, what is N? I have Ar=v^2 / r 9.89^2 m/s / 10m = 9.78 m/s Then F=N-mg=ma N=mg+ma N= m (g+a) N= 60 kg (9.8 m/s^2 + 9.78 m/s) = N= 1,174.8 is that m/s or N as in Newtons?---------is this correct?

Homework Statement I have a hill with a roller coaster cart on it and it goes down and around a loop-the-loop the radius of the loop is 10m Diameter=20m What is the minimum speed the cart needs to go to keep it on the track? There is no friction, what is the height of the hill...

Is this correct? Ma Vao + Mb Vbo = MaVaf + Mbf Vbf .8 Vao + 1.6 Vbo = .8 Vaf + 1.6 Vbf .8 + 0 + 1.6 (1) = .8 Vaf + 1.6 (.3) 1.6 (.7) = .8 Vaf Vaf= sqrt 2.07 Vaf= 1.4 m/s ?