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Rotation
Classical mechanics doesn't just describe how an object's position behaves under external influences, but also how its orientation behaves. Using the same principles found in Newtonian mechanics, laws and relations governing rotation can also be derived. Please direct all your questions about moments of inertia, angular velocity, angular momentum, centripetal force, centrifugal force, torque, and spin here.
645 Questions
http://answers.yahoo.com/question/index?qid=20080709220243AAS7f8I
go to this link and there is a problem just like it, just different numbers. it is correct..i checked it with my physics book solutions!
What objects are made with Hematite?
Hematite is a type of iron ore, if you grind it into a fine powder it makes the natural pigment ochre which is used by native people in southern and east Africa (mixed with fat) to adorn their bodies. Hematite can also be used to make a form of black shiny jewelery. == ==
What is the angular speed in rads per sec of a motor that makes 300 rev per sec?
1 revolution (1 circle) is equivelant to 360 degrees, or 2 pi radians. In this way, 1 revolution per second is equal to 2 pi radians per second. Therefore, to get 300 revs per sec in rads per sec, simply multiply 300 by 2 pi radians: 300*2pi = 300*2*3.1415 = 1885 revs per sec
It's either the axiom or the velocity of the swinging motion.....of course the yoyo must be goin in a full loop or circle (not the yoyo spinning itself) to act on it... other than that im almost 80% sure im right.
What is the relationship between axis of rotation and center of gravity?
The axis of rotation is an imaginary line around which an object rotates, while the center of gravity is the point where the weight of an object is evenly distributed in all directions. The axis of rotation and the center of gravity may or may not coincide depending on the shape and distribution of mass in an object. If the axis of rotation passes through the center of gravity, the object will rotate without experiencing any wobbling or unbalanced forces.
In a rotating system, centrifugal force is an apparent force pushing objects away from the center. In a vortex, objects are pulled inward due to the conservation of angular momentum. The swirling motion of a vortex pulls objects towards the center due to the forces generated by the fluid flow.
What physics principle explains why a water sprinkler spins?
The principle of conservation of angular momentum explains why a water sprinkler spins. As the water exits the sprinkler nozzle in one direction, an equal and opposite reaction force is applied in the opposite direction, causing the sprinkler to rotate. This rotation continues due to the conservation of angular momentum in the system.
The spin of a ball is caused by the forces acting on it, such as when it is kicked or thrown. Asymmetries in the ball's shape or the surface it interacts with can also contribute to its spin. This spinning motion affects the ball's trajectory and stability in flight.
What is the physical significance of orbital angular momentum?
Orbital angular momentum refers to the rotational motion of a particle around a fixed point. It is important in quantum mechanics as it quantizes the angular momentum associated with the motion of an electron around the nucleus in an atom. The magnitude and direction of orbital angular momentum affect the energy levels and the spatial distribution of electron clouds in atoms.
Where should a force be applied to a lever arm to produce the most torque?
A force should be applied at the end of the lever arm farthest from the fulcrum to produce the most torque. This maximizes the lever arm length, resulting in a greater moment arm for the force and thus higher torque.
Centrifugal force operates on a vehicle every time the driver?
Centrigugal force operates on the tires to hold them together and has nothing to do with acceleration or deceleration.
1 Dimension formula for Angular momentum?
Sorry i don't know the exact formula but it involves the quantum physics tensorantisymmetric angular momentum operators. it something to do with the ability to generalize advanced mathematics of the universe to arbitrary dimensions i have not tried to do math but i think it just is helicity. angular momentum in 1 dimension simply is a + or a - (and a h-bar/2 constant somewhere i think) that says if its motion is aligned with its spinsor or something. to generalise angular momentum in n-dimensional case is; 1 a + or a - (one level below a scalar) 2 a scalar (just a number with no direction other than + and -) 3 a vector (has direction and value) 4 a tensor (a matrix in this case) that has more than one direction and a value space time geometry or 1 - 3 dimensions a complicated Clifford algebra tensor that i don't want to think of basically in classical mechanics angular momentum is only defined in dimensions of 2 and 3 physicists and mathematicians have generalized it to n-dimensional space but it is not a what you would learn in high school. hope i did OK since i don't even understand all of this but it should at least tell you how complicated it is. try out http:/en.wikipedia.org/wiki/Feynman_checkerboard it is a topic on angular momentum in 1 spacial dimension by some one much smarter than me
When a spinning top is just about to stop it reverse it's direction of spin. Why?
When a spinning top is about to stop, the friction between the top and the surface causes it to slow down. This friction can create forces that make the top wobble, leading it to reverse its direction of spin momentarily before coming to a complete stop.
What is the dimension formula of angular velocity?
angular velocity (omega) = theta/time taken
theta is dimensionless i.e. it has no dimensions
therefore, the diemnsion of angular velocity is 1/T=T^-1
If a body is rotating is it necessarily bejng acted upon by an external torque?
No. Just as no force is required to keep a moving body moving in a straight line
at constant speed, no torque is required to keep a rotating body rotating at a
constant speed. External torque is present only if the body's rate of rotation is
changing.
If a body is rotating is it necessarily being acted upon by an external torque?
No, a rotating body can maintain its rotation without an external torque if it has an initial angular momentum or is in space with no external forces. However, if the body experiences a change in its rotation speed or direction, then an external torque is likely acting upon it.
What is relation between torque and speed?
Torque is a force times a distance (the distance from the rotation axis where the force is applied). The angle at which the force is applied can also play a role. It is not directly related to speed.
Torque is a force times a distance (the distance from the rotation axis where the force is applied). The angle at which the force is applied can also play a role. It is not directly related to speed.
Torque is a force times a distance (the distance from the rotation axis where the force is applied). The angle at which the force is applied can also play a role. It is not directly related to speed.
Torque is a force times a distance (the distance from the rotation axis where the force is applied). The angle at which the force is applied can also play a role. It is not directly related to speed.
the mass of an object. The greater the mass of an object, the greater its inertia. Additionally, inertia also depends on the velocity of the object - the faster an object is moving, the greater its inertia.
Centrifugal force is often referred to in a non-inertial frame of reference, such as when measuring the forces acting on an object in a rotating system. While it is a convenient concept for analysis, it is actually a fictitious force that arises due to the inertia of an object in motion. In an inertial frame of reference, such as an observer at rest, centrifugal force does not exist.
Answer #1:
The Rotational Inertia of an object increases as the mass "increases" and the
distance of the mass from the center of rotation "decreases".
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Answer #2:
If Answer #1 were correct, then flywheels would be made as small as possible,
and a marble would be harder to spin than a wagon wheel is.
An object's rotational inertia (moment of inertia) increases in direct proportion
to its mass, and increases in proportion to the square of the distance of the
mass from the center of rotation.
Why How does the type of coin affect how many time the coin spins around in 10 minutes?
The type of coin can affect its weight and thickness, which in turn can influence how easily it spins in a set amount of time. A heavier and thicker coin might not spin as many times in 10 minutes compared to a lighter and thinner coin. Additionally, the design of the coin, such as the presence of ridges or engravings, can also impact its spinning ability.
How a body can have angular momentum when it is moving in straight line?
If a body is moving in a straight line then it would have angular momentum about any point which is not along its line of motion. The magnitude of the angular momentum would be its velocity times the perpendicular distance between the line of motion and the point.
7 radians per second IS the angular speed in this case. You don't need to calculate anything else.
