HSC Physics Practice Questions - HSC Physics (NSW Higher School Certificate, Year 12) Exam

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An object moves in a horizontal circle of radius r at a constant speed v. Which option correctly identifies the directions of its velocity vector and centripetal acceleration vector?

Velocity is directed tangentially to the path; centripetal acceleration is directed towards the centre of the circle. Velocity is directed towards the centre of the circle; centripetal acceleration is directed tangentially. Both velocity and centripetal acceleration are directed radially outward. Velocity is directed tangentially; centripetal acceleration is directed radially outward.

Correct Answer:

Velocity is directed tangentially to the path; centripetal acceleration is directed towards the centre of the circle.

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