Question detail
If an object has a mass of 3.2 kg and is on a surface where the gravitational field strength is 9.8 N kg⁻¹, what is its weight 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
If an object has a mass of 3.2 kg and is on a surface where the gravitational field strength is 9.8 N kg⁻¹, what is its weight Explain your answer using Gravity and weight and weight.
Answer
The weight is calculated as W = m × g = 3.2 kg × 9.8 N kg⁻¹ = 31.36 N, which rounds to 31.4 N.
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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