Angular displacement in radians

In summary, the problem involves a wheel with a radius of 0.450 m and a rope being pulled with a force of 4.64 N, causing the wheel to spin counterclockwise. The question is to find the angular displacement of the wheel during one revolution and show that the work done is equal to the product of torque and angular displacement. To solve this, we first need to determine how many radians one revolution is equivalent to, which is 2π radians or 360 degrees. From there, we can use the equation W = τΔθ to show that the numerical value of the work done is equal to the product of torque and angular displacement.
  • #1
lalahelp
75
0

Homework Statement


The radius of a wheel is 0.450 m. A rope is wound around the outer rim of the wheel. The rope is pulled with a force of magnitude 4.64 N, unwinding the rope and making the wheel spin CCW about its central axis. Ignore the mass of the rope.


What is the angular displacement Δθ, in radians, of the wheel during 1.00 revolution?
Show that the numerical value of the work done is equal to the product τΔθ


Could someone please explain how to solve this
 
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  • #2
What have you tried?

Where are you stuck?

If you wrap a rope around the wheel one time, how much rope does that take?
 
  • #3
I do not know how to begin...
 
  • #4
How many degrees correspond to one revolution?

How many radians is that equivalent to?
 
  • #5
360 degress
2pie radian
 
  • #6
That's a start.
 
  • #7
ok got that, how do I Show that the numerical value of the work done is equal to the product τΔθ
 

Related to Angular displacement in radians

What is angular displacement in radians?

Angular displacement in radians is a measure of the amount of rotation an object undergoes around a fixed point. It is represented in terms of radians, which is a unit of measurement for angles.

How is angular displacement in radians different from angular displacement in degrees?

Angular displacement in radians and degrees are two different ways of measuring the same thing: rotation. However, radians are a more natural unit of measurement for angles and are often used in mathematical calculations involving rotational motion.

How is angular displacement in radians calculated?

Angular displacement in radians is calculated by dividing the arc length of the circle traveled by the radius of the circle. This ratio is equivalent to the angle in radians.

What is the relationship between angular displacement in radians and linear displacement?

Angular displacement in radians and linear displacement are related through the formula s = rθ, where s represents linear displacement, r represents the radius of the circle, and θ represents angular displacement in radians. This formula is derived from the definition of radians as the ratio of arc length to radius.

How is angular displacement in radians used in real-world applications?

Angular displacement in radians is used in various fields, such as physics, engineering, and astronomy, to measure rotational motion and calculate angular velocity and acceleration. It is also used in navigational systems and robotics to determine the position and orientation of objects in space.

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