Given the question: Q: Of course, a net external force is needed to cause any acceleration, just as newton proposed in his second law of what? Read this paragraph and choose the correct option from the provided answers: Of course, a net external force is needed to cause any acceleration, just as Newton proposed in his second law of motion. So a net external force is needed to cause a centripetal acceleration. In Centripetal Force, we will consider the forces involved in circular motion. PhET Explorations: Ladybug Motion 2D Learn about position, velocity and acceleration vectors. Move the ladybug by setting the position, velocity or acceleration, and see how the vectors change. Choose linear, circular or elliptical motion, and record and playback the motion to analyze the behavior. Choices: - land - gravity - speed - motion A:
The answer is:
motion