Calculating Rotational Speed for Wheel C: 240.7 rev/min

AI Thread Summary
To determine when wheel C reaches a rotational speed of 240.7 rev/min, the relationship between the angular speeds of wheels A and C must be established, considering their radii. Wheel A's angular acceleration is given as 7.1 rad/s², and its initial speed is zero. The calculations involve converting the target speed of wheel C into radians per second and applying the formula for angular speed. Participants in the discussion suggest reviewing the calculations for potential errors in the math or unit conversions. Accurate calculations are essential to find the correct time for wheel C to achieve the desired speed.
hatingphysics
Messages
14
Reaction score
0
Wheel A of radius ra = 14.6 cm is coupled by belt B to wheel C of radius rc = 28.8 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 7.1 rad/s2. At what time will wheel C reach a rotational speed of 240.7 rev/min, assuming the belt does not slip?

I did ...Vta = Vtc, but stil didint get it. i got the Vtc
value and divided that by raduis of A to get w for a. then
divided the acceleration by the w for a, but my time is
still wrong!
 

Attachments

  • belt.gif
    belt.gif
    7 KB · Views: 552
Physics news on Phys.org
Sounds like you are basically using the correct approach. Can you please post your calculations (including units) so we can see if it's just a math error?
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

What is the Linear Distance and Angular Velocity of a Rotating Potter's Wheel?
Replies
7
Views
2K
Calculate the radius of this rotating wheel
Replies
9
Views
2K
Calculating Flywheel Rotations in Angular Speed and Constant Acceleration
Replies
10
Views
2K
Shooting an arrow through the spokes of a turning wheel
Replies
7
Views
2K
Connected Wheels Problem. Angular Velocity.
Replies
3
Views
4K
How Does a Vacuum Cleaner Belt Influence Rotational Motion Dynamics?
Replies
3
Views
5K
How to calculate angular speed?
Replies
7
Views
3K
Calculating Radial Acceleration of a Rotating Wheel
Replies
2
Views
4K
Calculating Revolutions for a Spinning Wheel | Circular Motion Problem
Replies
18
Views
2K
Calculation of torque to stop a wheel.
Replies
4
Views
6K

Hot Threads

Recent Insights

Back
Top