Question detail
A 50‑N weight is measured on a scale in a laboratory where the gravitational field strength is 9.8 N kg⁻¹. What is the mass of the object Explain your answer using Gravity and weight and weight.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Forces and their interactions
Question
A 50‑N weight is measured on a scale in a laboratory where the gravitational field strength is 9.8 N kg⁻¹. What is the mass of the object Explain your answer using Gravity and weight and weight.
Answer
The mass is found by dividing the weight by the gravitational field strength: 50 N ÷ 9.8 N kg⁻¹ ≈ 5.1 kg. The object therefore has a mass of about 5.1 kg.
Explanation
A strong answer should address calculate mass from weight and gravitational field strength directly. Use the context of Gravity and weight within Forces and their interactions, then state the relevant forces or motion reasoning with units where needed. The answer is correct when it names the key physics quantity, keeps mass and weight distinct, and links the conclusion back to the approved learning objective.
Common mistake
Confusing Mass and Weight
Students often confuse mass with weight, thinking they are the same quantity.
Remember that mass is measured in kilograms and is a scalar quantity, while weight is a force measured in newtons and is a vector quantity.
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