# Recent content by sealedhuman77

1. ### Magnitude of Torque

the Tau and Alpha symbols are not suppose to be superscripts. i screwed up the tex
2. ### Magnitude of Torque

Homework Statement Massive spinning flywheels (disks) can be used for storing energy. Consider a flywheel with a diameter of 1.10 m and a mass of 510 kg. A constant force of magnitude F is applied tangentially to the rim of the flywheel to accelerate it from rest to 4.00 x 103 rev/min during...
3. ### Center of Mass and Moment of Inertia

moving it up again

moving it up
5. ### Help me out here

no g is always equal to -9.8 m/s^2. though the sign changes according to the orientation of the coordinate system
6. ### Center of Mass and Moment of Inertia

Homework Statement Find the center of mass of the collection of mass points in Figure P.12 and then find the moment of inertia of the system about an axis through the center of mass and parallel to the y-axis. Homework Equations Center of Mass Moment of Inertia The Attempt at a...
7. ### What is the difference between movement in one and two dimensions

for one dimensional, things are only moving in a straight line. for two dimensional, both the x and y coordinates have to be taken into account.
8. ### Typical Forces and friction question

I think kinetic friction is found by multiplying the friction coefficient by normal force. So the normal force must be found. Not really sure about tension.
9. ### Speed of Center of Mass

Ok, I got it now. I realized that the speed of the center of mass was the same as the final velocity of the two cars, which happened to be the same answer to part a. Thanks for the help.
10. ### Inelastic Collision

With the coefficient of kinetic friction, am I suppose to use it with normal force to find frictional force? And also, I don't really understand how frictional force applies to deceleration.
11. ### Speed of Center of Mass

I still don't understand the problem. I know that the moving coal car is moving at 2m/s and it hits the stationary coal car. But the problem does not specify which direction the moving coal car is coming from or how far it is initially. I don't know if I could use the final velocity of the two...
12. ### Cricket bat impulse problem

Thanks I got it now.
13. ### Cricket bat impulse problem

Homework Statement A 20 g cricket (Acheta domestica) leaps through a 2.2 m horizontal distance. The initial velocity of the cricket makes a 28° angle with the horizontal direction. If it takes the cricket 0.010 s to leave the ground, what is the magnitude of the impulse of the total force on...
14. ### Inelastic Collision

Homework Statement A Cadillac of mass 2250 kg going east collides with a Geo of mass 1180 kg headed north on a level highway. The cars remain tangled and slide to rest after traveling 25 m in a straight line at an angle of 20° north of east. The coefficient of kinetic friction for the tires on...
15. ### Speed of Center of Mass

Homework Statement [/B] A loaded coal car with a mass of 120 metric tons traveling at 2 m/s collides and couples with an empty, stationary coal car with a mass of 8 metric tons. (1 metric ton = 103 kg) (c) What is the speed of the center of mass of the system of two cars throughout the...