Physics · Motion
The motion of a satellite orbiting the Earth in a circular path at constant speed is an example of uniform circular motion. What property of this motion prevents its acceleration from being zero?
- 1The object's mass continually changes due to orbital dynamics.
- 2The speed is too high for the gravitational force to sustain a constant velocity.
- 3The total mechanical energy is conserved, necessitating constant acceleration.
- 4The direction of motion changes continuously at every point, meaning the velocity vector is constantly changing.✓
Correct answer
The direction of motion changes continuously at every point, meaning the velocity vector is constantly changing.
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