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An object moving at 25 m/s is brought to rest in 5 seconds. The final velocity is _________.
20 m/s
0 m/s
25 m/s
5 m/s
0 m/s
Final velocity is defined as the velocity of an object after a period of acceleration or deceleration. Since the object is brought to rest, its motion ceases completely, resulting in a final velocity of 0 m/s regardless of the initial speed or time taken.
Final velocity is defined as the velocity of an object after a period of acceleration or deceleration. Since the object is brought to rest, its motion ceases completely, resulting in a final velocity of 0 m/s regardless of the initial speed or time taken.
This concept relates to Newton's First Law of Motion, which defines inertia, stating that an object at rest stays at rest unless acted upon by an external unbalanced force.
Final velocity is the speed of an object at the end of a specific time interval.
The phrase 'brought to rest' is a standard scientific term indicating that the final velocity is zero.
Deceleration (or retardation) is the negative acceleration observed when an object is brought to a stop.
Initial velocity (u) in this scenario is 25 m/s, time (t) is 5 seconds, and final velocity (v) is 0 m/s.
The acceleration (a) can be calculated using the formula v = u + at, resulting in -5 m/s squared.
Option A, C, and D represent intermediate speeds during the deceleration process, but they do not represent the final state of being at rest.
B is correct тАФ By definition, an object that has been brought to rest has no remaining velocity, resulting in a final value of 0 m/s.
When solving motion problems, always look for keyword markers like 'starts from rest' (u=0) or 'brought to rest' (v=0) to simplify your kinematic equation variables.
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