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Which of the following is an example of uniform motion?
A car going around a circular track at a constant speed.
A person at rest starts running in a straight line in a fixed direction.
A Ball dropped from the top of a building.
A hockey puck sliding in a straight line at a constant speed

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Answer:

A hockey puck sliding in a straight line at a constant speed

Explanation:

A object is said to be in uniform motion if it describes a straight path with respect to an observer, with constant speed over time. Therefore, its acceleration is zero, that is, the net force applied on the object is zero. The hockey puck meets these conditions.

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