DP Physics (last assessment 2024)

Question 22M.2.HL.TZ2.7c.ii

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.2.HL.TZ2.7c.ii
Level	HL	Paper	2	Time zone	TZ2
Command term	Show that	Question number	c.ii	Adapted from	N/A

c.ii.

[Maximum mark: 1]

22M.2.HL.TZ2.7c.ii

A metal sphere is charged positively and placed far away from other charged objects. The electric potential at a point on the surface of the sphere is 53.9 kV.

A small positively charged object moves towards the centre of the metal sphere. When the object is 2.8 m from the centre of the sphere, its speed is 3.1 m s⁻¹. The mass of the object is 0.14 g and its charge is 2.4 × 10⁻⁸C.

(c.ii)

Show that the kinetic energy of the object is about 0.7 mJ.

[1]

Markscheme

$\frac{1}{2} \times 0.14 \times 10^{- 3} \times 3 . 1^{2}$ OR 0.67 «mJ» seen ✓

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Core

Core » Topic 2: Mechanics » 2.3 – Work, energy, and power

Core » Topic 2: Mechanics

Question 22M.2.HL.TZ2.7c.ii

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