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Question 21N.2.HL.TZ0.3b.ii

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Date November 2021 Marks available [Maximum mark: 2] Reference code 21N.2.HL.TZ0.3b.ii
Level HL Paper 2 Time zone TZ0
Command term Calculate Question number b.ii Adapted from N/A
b.ii.
[Maximum mark: 2]
21N.2.HL.TZ0.3b.ii

Two equal positive fixed point charges Q = +44 μC and point P are at the vertices of an equilateral triangle of side 0.48 m.

Point P is now moved closer to the charges.

A point charge q = −2.0 μC and mass 0.25 kg is placed at P. When x is small compared to d, the magnitude of the net force on q is F ≈ 115x.

(b.ii)

Calculate the period of oscillations of q.

[2]

Markscheme

«a=Fm=»ω2x=115x0.25 ✓

T=«2πω=» 0.29 «s» ✓

 

Award [2] marks for a bald correct answer.

Allow ECF for MP2.

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