What is the mass of car 1 if it weighs 700 kg?

The mass of an object is a measure of the amount of matter present in that object and is typically expressed in kilograms (kg). When the question states that car 1 weighs 700 kg, it is directly providing its mass.

The weight of an object, on the other hand, is the force exerted by gravity on that mass and is typically measured in newtons (N). Weight can be calculated using the equation: weight = mass × gravitational acceleration (where the standard gravitational acceleration is approximately 9.81 m/s²).

Since the question specifies that car 1 weighs 700 kg, it is clear that this value represents mass rather than weight, aligning with the proper definition. Therefore, the correct understanding of mass in this context is why the choice stating 700 kg is valid.

In contrast, the other options either misrepresent the weight (like stating it in newtons when mass is required) or provide incorrect mass values that do not match the information given in the question.