The net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).
<h3>Net electric force on the charges</h3>The net electric force on the charges is calculated as follows;
F = kq₁q₂/r²
where;
Thus, the net electric force acting on a positive test charge at the origin is determined as ¹/₉(kq₁q₂).
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Answer:
C. At a particular instant
Explanation:
Speed is the defined as the ratio between the distance covered by an object and the time taken:
where d is the distance and t the time.
However, there are two possible measurements of speed:
- Average speed: this is the speed measured over a non-zero time interval (for example: a car moving 100 metres in 5 seconds; its average speed is
- Instantaneous speed: this is the speed of an object measured at a particular instant in time, so for a time interval that tends to zero. So, in the previous example, the average speed is 20 m/s but the instantaneous speed of the car at various instants of time can be different from that value.