AIR RESISTANCE AND TERMINAL VELOCITY
2 marks · EasyCalculate the weight of a backpack with a mass of 3.0 kg on Earth. Use g = 10 N/kg.
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30 N (±0.5)
Also accept: 30.0 N
Common mistakes: Multiplying by 9.8 N/kg for this question
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Marking points
M1 · 1 mark · Substitutes the correct values into W = m × g
A1 · 1 mark · Correct answer with correct unit: 30 N
Worked solution
Given:
mass, m = 3.0 kg
gravitational field strength, g = 10 N/kg
W = 3.0 \times 10 = 30
The weight of the backpack is 30 N.