Mass vs. Weight: Understanding the Difference
Open this deck in Kuraplan
Sign in to view all 29 slides, customise, present or download.
Slide preview
First 12 of 29 slides
Mass vs. Weight: Understanding the Difference
Year 10 Physics New Zealand Curriculum 45 minutes
WALT (We Are Learning To)
Distinguish between mass and weight Calculate weight using the formula W = mg Apply knowledge to real-world scenarios Understand how gravity affects weight
Success Criteria
I can explain the difference between mass and weight I can use the formula W = mg correctly I can solve problems involving mass and weight I can predict weight changes in different gravitational fields
Think-Pair-Share
What do you think is the difference between mass and weight? Discuss with your partner for 2 minutes Be ready to share your ideas
What is Mass?
The amount of matter in an object Measured in kilograms (kg) Does NOT change with location An intrinsic property of matter
What is Weight?
The force of gravity acting on an object Measured in Newtons (N) DOES change with location Depends on gravitational field strength
Mass vs Weight Comparison
{"left":"Amount of matter in object\nForce of gravity on object\nMeasured in kilograms (kg)\nMeasured in Newtons (N)","right":"Stays the same everywhere\nChanges with gravity\nScalar quantity\nVector quantity (has direction)"}
The Weight Formula
W = m × g W = Weight (Newtons) m = mass (kilograms) g = gravitational field strength (N/kg)
Gravitational Field Strength
On Earth: g = 9.8 N/kg (≈ 10 N/kg) On Moon: g = 1.6 N/kg On Jupiter: g = 24.8 N/kg In space: g = 0 N/kg
Calculation Practice 1
A student has a mass of 50 kg Calculate their weight on Earth Show your working: W = m × g Remember: g = 10 N/kg
Solution: Weight on Earth
Given: m = 50 kg, g = 10 N/kg Formula: W = m × g Calculation: W = 50 × 10 = 500 N Answer: The student weighs 500 N
Differentiated Practice
Foundation: Calculate weight of 30 kg object on Earth Standard: Find mass if weight is 800 N on Earth Extension: Compare weights on Earth vs Moon for 60 kg object