Final answer:
The weight of a 1.2 gram bullet on Earth can be found by converting its mass to kilograms and multiplying by the acceleration due to gravity. The resulting weight is approximately 0.012 newtons (N).
Step-by-step explanation:
The question you've asked relates to calculating the weight of an object, which in physics is a product of its mass and the acceleration due to gravity (on Earth, typically 9.80 m/s²). The weight is given by the formula W = mg, where W represents weight in newtons (N), m is the mass of the object in kilograms (kg), and g is the acceleration due to gravity.
To find the weight of a 1.2-gram bullet:
- Convert the mass of the bullet from grams to kilograms by dividing by 1000. So, 1.2 grams is 1.2 / 1000 kg = 0.0012 kg.
- Use the formula W = mg to calculate the weight. Therefore, W = 0.0012 kg × 9.80 m/s² = 0.01176 N.
- We round the result to two significant figures as the mass was given to two significant figures, which gives us 0.012 N.
So, the weight of the bullet on Earth is 0.012 N.
Note: in the United States, the more familiar unit of force is the pound (lb), where 1 N = 0.225 lb. However, for scientific calculations, we most commonly use the unit newton (N).