A stone has a mass of 40 grams, It weight is
Correct answer: B. 0.392 N
- A. 128 N
- B. 0.392 N
- C. 128 dynes
- D. 39 N
Explanation
To find the weight of the stone, we use the formula Weight = mass × gravitational acceleration. The mass of the stone is 40 grams, which is 0.04 kg (since 1 kg = 1000 grams). The standard gravitational acceleration on Earth is approximately 9.8 m/s². Thus, the weight = 0.04 kg × 9.8 m/s² = 0.392 N. Option B is correct. Option A assumes an incorrect scenario, Option C uses a different unit (dynes), which isn't the correct conversion, and Option D reflects a miscalculation.
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