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A bar on a hinge starts from rest and rotates with an angular acceleration 10 6t rads2 where t is in seconds Determine the angle in radians through which the bar turns in the first 3.26 s?
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If a body is rotating is it necessarily being acted upon by an external torque?
No. Torque is required only for producing angular acceleration. A body rotates with constant angular velocity if no external torque acts on it.
What is the final angular speed of the system if a solid horizontal cylinder of mass 10 Kg and radius 1m rotates with an angular speed of 7.00 rad slash s about a fixed vertical axis?
7 radians per second IS the angular speed in this case. You don't need to calculate anything else.
A bicycle wheel rotates uniformly through 2 revolutions in 4 seconds What is the average angular speed of the wheel?
Angular velocity (omega) = delta theta / delta time omega = 2 /4 = .5 rev/s = pi radians/s
What is angular velocity in physics?
It means how fast something rotates. Rather than taking the linear speed (meters per second, or some other common unit of speed), the angular velocity is specified in radians per second, degrees per second, revolutions (full turns) per minute, or something similar. By this definition, each part of a solid, rotating object rotates at the same angular speed.
With constant velocity the disc rotates at a constant speed?
Angular
What is the angular velocity of the wheel before braking began if the wheel rotates through 6 radians in 2 seconds as it is uniformly brought to rest?
It was 6 radians per second. Angular acceleration = -3 radians per second2 Initial angular velocity = 6 radians per second. Final angular velocity = zero. Average angular velocity = 3 radians per second. Angular displacement in 2 seconds = 3 x 2 = 6 radians.
If a body is rotating is it necessarily being acted upon by an external torque?
No. Torque is required only for producing angular acceleration. A body rotates with constant angular velocity if no external torque acts on it.
What is the final angular speed of the system if a solid horizontal cylinder of mass 10 Kg and radius 1m rotates with an angular speed of 7.00 rad slash s about a fixed vertical axis?
7 radians per second IS the angular speed in this case. You don't need to calculate anything else.
A bicycle wheel rotates uniformly through 2 revolutions in 4 seconds What is the average angular speed of the wheel?
Angular velocity (omega) = delta theta / delta time omega = 2 /4 = .5 rev/s = pi radians/s
What is angular velocity in physics?
It means how fast something rotates. Rather than taking the linear speed (meters per second, or some other common unit of speed), the angular velocity is specified in radians per second, degrees per second, revolutions (full turns) per minute, or something similar. By this definition, each part of a solid, rotating object rotates at the same angular speed.
With constant velocity the disc rotates at a constant speed?
Angular
The engine of a sports car rotates at 5000 revolutions per minute rpm Calculate the angular speed of the engine in radians per second. Use 2 radians equals 1 revolution.?
5000 rpm = (5000 / 60) = 83 and 1/3 rev per second. IF (and that's a big IF) each rev = 2 radians, then the angular speed is (83 and 1/3) x 2 = 166 and 2/3 rad/sec. But wait ! Don't go away. That's a bogus answer. We cannot allow a sterling example of our fine work here at Wiki.Answers to go out with the claim that 1 revolution is the same as 2 radians. It's not ! 1 revolution = 2 pi radiansThe true angular speed of that engine is (83 and 1/3) times (2 pi) = 523.6 radians per second (rounded)
Where does the moon rotate?
The moon rotates in space. As for HOW the moon rotates, it rotates about it's own axis and revolves around the Earth. As for WHY, it is due to the conservation of angular momentum.
What is ment by angular momentum and angular velocity?
Angular velocity means how fast something rotates. The exact definition of angular momentum is a bit more complicated, but it is the rotational equivalent of linear momentum. It is the product of moment of inertia and angular speed.
Where is angular momentum found?
It isn't an object which can be found of itself, but objects possessing angular momentum are those which are turning.
Why does the earth rotates east to west not west to east?
because the majority of the solar system rotates the same way. conservation of angular momentum.
What is angular speed and angular velocity?
That is analogous to linear speed and velocity, but for rotation. Whereas a linear speed (or velocity) is expressed in meters per second (or some other units of distance / time), the angular speed or velocity is expressed in radians / second (or some other units of angle / time). Of course, when something rotates, there is also a linear speed, but different parts of an object rotate at different linear speeds, whereas the angular speed is the same for all parts of a rotating object - at least, in the case of a solid object. For example: the Earth rotates at an angular speed of 1 full rotation / day. The linear speed at the equator is approximately 1667 km/hour; close to the poles, the linear speed is much less.
