Satellite Motion: Speed & Centripetal Accel.

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Homework Help Overview

The discussion revolves around the motion of a satellite in a circular orbit 690 km above the Earth's surface, with a focus on calculating its speed and centripetal acceleration based on a given orbital period of 98.4 minutes.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the conversion of units for radius and time, with one participant noting confusion over their calculations and results. There is an inquiry into the correct interpretation of the radius of the orbit in relation to the Earth's center.

Discussion Status

The conversation is ongoing, with participants seeking clarification on their calculations and the underlying concepts. Some guidance has been offered regarding the need for unit conversions and the importance of understanding the radius in context.

Contextual Notes

Participants are working under the constraints of homework rules that require them to demonstrate effort before receiving help. There is a noted confusion regarding the calculations and the definitions of terms related to satellite motion.

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An Earth satellite moves in a circular orbit 690 km above the Earth's surface. The period of the motion is 98.4 min.
(a) What is the speed of the satellite?
in m/s
(b) What is the magnitude of the centripetal acceleration of the satellite?
 
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first i converted to meters...radius now equals 690000m. and converted 98.4 min to 5904 sec.
2pi 690000/ 111.667
i plugged that into the answer and was told that i had done it wrong.
i also came up wit 734 and 34 I am extremely confused
 
tjcreamer9 said:
first i converted to meters...radius now equals 690000m. and converted 98.4 min to 5904 sec.
2pi 690000/ 111.667
i plugged that into the answer and was told that i had done it wrong.
i also came up wit 734 and 34 I am extremely confused

The satellite is 690 km above the surface of the earth. What is its distance from the centre of the earth? That's what the radius of the orbit is.
 

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