Tension in an object moving with circular motion

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Homework Help Overview

The discussion revolves around a problem involving an object of mass 0.8 kg moving in a horizontal circular motion with a radius of 2 m and a constant speed of 15 m/s. Participants are tasked with calculating the tension in the string that is providing the centripetal force for this motion.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss various attempts to analyze the problem, including calculations of angular velocity, frequency, and time period. Some question the necessity of these calculations and suggest focusing on the relevant equations for tension and centripetal acceleration. Others prompt the original poster to consider drawing a free body diagram and analyzing the forces involved.

Discussion Status

The discussion is active, with participants providing guidance on how to approach the problem without reaching a consensus on a specific method. There are suggestions to analyze forces and use relevant equations, indicating a productive exploration of the topic.

Contextual Notes

Some participants express confusion about the relevance of certain calculations and emphasize the need for a clear understanding of the physical concepts involved, such as centripetal acceleration and tension in the context of circular motion.

Nat Reed
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Homework Statement


An object of mass 0.8kg is whirled round in a horizontal circle of radius 2m with a constant speed of 15ms-1. Calculate the tension in the string.

The Attempt at a Solution


So far I have calculated that the angular velocity is 7.5rads-1, the frequency is 1.19Hz and the time period is 0.84s, I'm just not sure where to go from here.
 
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Where did the relevant equations section go?
You didn't need to find angular velocity, frequency or period.
There is a single equation you can use to find tension from the given variables.
 
Nat Reed said:

Homework Statement


An object of mass 0.8kg is whirled round in a horizontal circle of radius 2m with a constant speed of 15ms-1. Calculate the tension in the string.

The Attempt at a Solution


So far I have calculated that the angular velocity is 7.5rads-1, the frequency is 1.19Hz and the time period is 0.84s, I'm just not sure where to go from here.
Have you drawn a free body diagram? Do you know an equation for calculating the acceleration of the object?
 
Looks like you have everything you need in terms of variables
See if there is an equation that can use these variables to calculate centripetal acceleration
 
Draw the FBD and analyse the forces acting on the body.

Then frame an eqn. of horizontal and vertical eqbm.
U can get the required ans
 
Thank you very much for the help everyone!
 
Plz i nid formula to dat first question
 
darmzynyolarh said:
Plz i nid formula to dat first question
What are your thoughts on this so far? Can you say in words what is happening physically in this problem?
 

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