Rotational Kinematics Time Problem

In summary, the problem involves a spinning wheel with an initial counterclockwise rotation and an angular acceleration of -4.40 rad/s^2. The wheel's angular velocity changes from its initial value to a final value of -24.0 rad/s, while the angular displacement remains zero. The question asks for the time required for this change in angular velocity to occur. This problem can be solved using rotational kinematics formulas.
  • #1
whoopie88
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Homework Statement


A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.40 rad/s^2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -24.0 rad/s. While this change occurs, the angular displacement of the wheel is zero. (Note the similarity to that of a ball being thrown vertically upward, coming to a momentary halt, and then falling downward to its initial position.) Find the time required for the change in the angular velocity to occur.

Homework Equations


All Rotational Kinematics Formulas

The Attempt at a Solution


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Thank you in advance!
 
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  • #2
Can somebody please help me? I need this answer turned in by 11:59pm tonight! D:
 
1.

What is rotational kinematics time problem?

Rotational kinematics time problem is a type of physics problem that involves the motion of objects in circular or rotational motion. It deals with calculating the time it takes for an object to rotate a certain number of degrees or revolutions.

2.

What is the equation for rotational kinematics time problem?

The equation for rotational kinematics time problem is t = θ/ω, where t is the time, θ is the angular displacement, and ω is the angular velocity. This equation is derived from the definition of angular velocity, ω = Δθ/Δt.

3.

How do you solve a rotational kinematics time problem?

To solve a rotational kinematics time problem, you need to identify the given values, such as the angular displacement, angular velocity, and time. Then, you can use the equation t = θ/ω to calculate the missing value. It is important to make sure that all units are consistent (e.g. radians for angular displacement and radians/second for angular velocity).

4.

What are some common units used in rotational kinematics time problems?

Some common units used in rotational kinematics time problems include radians for angular displacement, radians/second for angular velocity, and seconds for time. Other units, such as degrees or revolutions, can also be used, but they may need to be converted to radians for the equation to work.

5.

What are some real-life applications of rotational kinematics time problems?

Rotational kinematics time problems have many real-life applications, including the motion of objects such as a Ferris wheel, the rotation of a fan, or the spinning of a CD or vinyl record. They are also used in engineering and design, such as in the design of gears and pulleys.

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