A satellite orbits Earth in a circular path. Which of the following statements best describes the relationship between the gravitational force acting on the satellite and its centripetal acceleration, assuming the satellite’s motion is modeled as uniform circular motion?
The gravitational force is equal in magnitude and opposite in direction to the centripetal acceleration.
The gravitational force provides the net force required for the centripetal acceleration of the satellite.
The gravitational force is perpendicular to the centripetal acceleration and does no work on the satellite.
The gravitational force and centripetal acceleration are independent of each other in uniform circular motion.
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Create Free Account Log inThis is a free VCE Units 3 & 4 Physics practice question worth 1 mark, testing your understanding of Satellite motion model. It falls under How do physicists explain motion in two dimensions? in Unit 3: How do fields explain motion and electricity?. Submit your answer above to receive instant AI-powered marking and personalised feedback.
In this unit students use Newton’s laws to investigate motion in one and two dimensions. They explore the concept of the field as a model used by physicists to explain observations of motion of objects not in apparent contact. Students compare and contrast three fundamental fields – gravitational, magnetic and electric – and how they relate to one another. They consider the importance of the field to the motion of particles within the field. Students examine the production of electricity and its delivery to homes. They explore fields in relation to the transmission of electricity over large distances and in the design and operation of particle accelerators. A student-designed practical investigation involving the generation of primary data and including one continuous, independent variable related to fields, motion or light is undertaken either in Unit 3 or Unit 4, or across both Units 3 and 4, and is assessed in Unit 4, Outcome 2. The design, analysis and findings of the investigation are presented in a scientific poster format.
In this area of study, students use Newton’s laws of motion to analyse linear motion, circular motion and projectile motion. Newton’s laws of motion give important insights into a range of motion both on Earth and beyond through the investigations of objects on land and in orbit. They explore the motion of objects under the influence of a gravitational field on the surface of Earth, close to Earth and above Earth. They explore the relationships between force, energy and mass.
Model natural and artificial satellite motion as uniform circular motion.
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