FORCES AND SHAPE
3 marks · NormalA person combs their hair and notices that some hairs are attracted to the comb. Explain why this happens and name the type of force involved.
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Must show: Rubbing causes the comb and hair to become charged, Opposite charges attract, Electrostatic force
Common mistakes: Not naming the type of force
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Mentions comb becomes charged by rubbing (or friction)
B2 · 1 mark · States that opposite charges attract
B3 · 1 mark · Identifies the force as electrostatic
Worked solution
Rubbing the comb against the hair causes both to become charged (static electricity). The opposite charges on the comb and some hairs attract each other. This is an electrostatic force.