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Communications satellites. Communications satellites are placed in orbits so that they always remain above the same point of the earth's surface. (a) What must be the period of such a satellite? (b) What is its angular velocity in rad/s?

a) $=24 \mathrm{hrs}$b) $7.27 \times 10^{-5} \mathrm{rad} / \mathrm{s}$

Physics 101 Mechanics

Chapter 9

Rotational Motion

Physics Basics

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

Cornell University

Rutgers, The State University of New Jersey

University of Michigan - Ann Arbor

Lectures

04:16

In mathematics, a proof is a sequence of statements given to explain how a conclusion is derived from premises known or assumed to be true. The proof attempts to demonstrate that the conclusion is a logical consequence of the premises, and is one of the most important goals of mathematics.

02:21

In physics, rotational dynamics is the study of the kinematics and kinetics of rotational motion, the motion of rigid bodies, and the about axes of the body. It can be divided into the study of torque and the study of angular velocity.

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Communications satellites …

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A communication satellite …

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For a satellite to be in a…

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(a) What linear speed must…

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A satellite is in a circul…

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in this problem. We have a satellite staying above the same point on Earth as the earth rotates. And so the saddle amos rotate with the Earth. Since the Earth rotates once every 24 hours because that's the length of a day. The period of the satellite for to return to the same spot is the same time. And so the period of the satellite is equal to 24 hours, which is equal to 86,400 seconds. Now. Part B wants to know the angular velocity of the satellite and the angler velocity is the angle traveled, divided by the time taken to travel. That angle, the angle traveled in one full revolution. Here it is to play Iranians because it's the full circle, and the time taken was calculated A as 86,400 seconds. And so if you do this in the calculator, you get 7.27 times 10 to the negative five radiance per second, and that stands for Barbie. And this is answer to party

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