Homework Statement
Two disks are rotating about an axis common to both. The first disk has moment of inertia I and angular velocity ω. The second disk has moment of inertia 2I and angular velocity \frac{ω}{2}
Both rotate in same direction
If both disks are pushed into each other what is the...
Homework Statement
There are four masses (particles) with a mass of 30gr each and they are at the vertices of a square that has each side with a length of 90cm.
What is the moment of inertia of this system through a perpendicular axis that is at the center of the square?The Attempt at a...
Oops.. The factor is 1/12 and I was thinking in (L*R)^{2} instead of (L+R)^{2}
So, trying again I've got the right result but am I doing it right?
I did this:
(sphere) Ip = Icm + Md^{2} <=> Ip = \frac{2}{5} MR^{2} + M(\frac{L}{2} + R)^2 <=> Ip = \frac{2}{5} M R^{2} +...
Oops.. The factor is 1/12 and I was thinking in (L*R)^{2} instead of (L+R)^{2}
So, trying again I've got the right result but am I doing it right?
I did this:
(sphere) Ip = Icm + Md^{2} <=> Ip = \frac{2}{5} MR^{2} + M(\frac{L}{2} + R)^2 <=> Ip = \frac{2}{5} M R^{2} +...
Homework Statement
A dumbbell has two spheres of radius 0.10m and mass 10kg (each). The two spheres are connected using a bar with length 1.0m and mass 12kg.
What is the moment of inertia of the dumbbell about an axis perpendicular to an axis at the bar's center of mass?
Moment of inertia...
To reach 100km/h it takes 16s and the car B takes 5s
But I still can't figure how to get how long after driver A starts driving should driver B start to reach it :confused:
Homework Statement
Two drivers met at a station and they discover that both have the same destination.
The driver A has a car which goes from 0 to 100km/h in 16s and driver B has a car which goes from 0 to 100km/h in 5s. The maximum velocity of each is 100km/h
How much time after driver A...
0
But it says "The springs are attached to a small cube and stretched to a length L of 0.32m" so that's why I tried with xf and xi. So should I try with
K = \frac{1}{2}k(x^{2}-0)?
This then becomes
x = 0.32-0.25 = 0.07
K = \frac{1}{2}200(0.07^{2}) = 0.49J * 2 (two springs) = 0.98J...
Homework Statement
In the figure on the right, a 4.0 kg ball is attached to the end of a 1.6 m rope, which is fixed at O.
The ball is held at A, with the rope horizontal, and is given an initial downward velocity. The ball moves through three quarters of a circle and arrives at B, with the...