A satellite moving around the earth constitutes______________?
Correct answer: B. Non-inertial frame
- A. An inertial frame of reference
- B. Non-inertial frame
- C. Neither inertial nor non-inertial
- D. Both inertial and non-inertial
Explanation
A satellite moving in a circular orbit continually changes the direction of its velocity, so it has centripetal acceleration toward Earth. A frame accelerating or rotating with respect to an inertial frame is non-inertial. Students may choose an inertial frame because the satellite’s speed is constant, but constant speed does not mean zero acceleration.
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Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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