Circular motion is an example of motion in:
Correct answer: B. Two dimensions
- A. One dimension
- B. Two dimensions
- C. Three dimensions
- D. No dimension
Explanation
Uniform In a circular motion, an object moves in two dimensions with a constant speed in a fixed circular direction; however, because the object's direction changes at every point, the velocity also changes, and the direction at each point is always the tangent. Another illustration of motion in two dimensions is uniform circular motion, where the item moves in a circle at a constant speed, but the velocity changes at each location as the velocity vector's direction changes. Hence, a circular motion is two-dimensional as it describes movement in a plane.
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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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