Answer:
The mass of the dragster body is 35 grams
Step-by-step explanation:
The given volume of the dragster body, V = 140 cm³
The density of balsa wood = 250 kg/m³
We convert the units of the volume of the dragster body from cm³ to m³ as follows
1 cm = 0.01 m
∴ 1 cm³ = 1 cm × 1 cm × 1 cm = 0.01 m × 0.01 m × 0.01 m = 0.000001 m³
140 cm³ = 140 × 1 cm³ = 140 × 0.000001 m³ = 0.00014 m³
The volume of the dragster body, V = 140 cm³ = 0.00014 m³
Density, ρ = Mass, m/(Volume, V)
∴ Mass, m = ρ × V = 250 kg/m³ × 0.00014 m³ = 0.035 kg = 35 g
The mass of the dragster body, m = 35 grams