To accurately describe magnitude and direction, we need to consider the forces involved in stopping the car that is traveling northward.
Let's analyze each scenario:
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A car traveling northward with 5 kN of force could be brought to a stop by a southward force of 5 kg.
- Inaccurate: Forces should be in the same units (newtons, not kilograms).
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A car traveling northward with 5 kN of force could be brought to a stop by a southward force of 10 kN.
- Accurate: A southward force of 10 kN is greater than the northward force of 5 kN, so it would stop the car.
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A car traveling northward with 5 kN of force could be brought to a stop by a southward force of 5 kN.
- Accurate: A southward force of 5 kN would exactly counteract the northward force of 5 kN, bringing the car to a stop.
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A car traveling northward with 5 kN of force could be brought to a stop by a northward force of 5 kN.
- Inaccurate: A northward force of 5 kN would not stop the car; it would maintain its current state of motion (net force would be zero).
The accurate answers are scenarios 2 and 3, which involve proper magnitudes and directions to bring the car to a stop. If you're looking for just one of those, scenario 3 is often a more straightforward case for bringing the car to a halt.