The number of radians in a complete circle is:
Correct answer: D. 2 π
- A. 360
- B. 180
- C. π
- D. 2 π
Explanation
There are 2π radians in a full circle. This value corresponds to a complete revolution, and it is the equivalent of 360°. The other options are incorrect as they represent different fractions of a circle in either degrees or incomplete radians.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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