1 The drag force F acting on a moving sphere obeys an equation of the form F = kAv 2
, where A
represents the sphere’s frontal area and v represents its speed.
What are the base units of the constant k?
A kg m5 s–4
B kgm–2 s–1
C kgm–3
D kgm–4 s2
Explaination
Answer
Answer C
2 The table contains some quantities, together with their symbols and units.
A kg m5 s–4
B kgm–2 s–1
C kgm–3
D kgm–4 s2
Explaination
Answer
Answer C
2 The table contains some quantities, together with their symbols and units.
Which expression has the units of energy?
Which expression has the units of energy?
A gρhV B g
ρ hV C hV
ρ g D ρg2
h
3.
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