DP Physics (first assessment 2025)

Question 22M.1A.HL.TZ1.33

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.HL.TZ1.33
Level	HL	Paper	1A	Time zone	TZ1
Command term		Question number	33	Adapted from	N/A

33.

[Maximum mark: 1]

22M.1A.HL.TZ1.33

An object of mass $m$ is launched from the surface of the Earth. The Earth has a mass $M$ and radius $r$ . The acceleration due to gravity at the surface of the Earth is $g$ . What is the escape speed of the object from the surface of the Earth?

A. $\sqrt{g r}$

B. $\sqrt{2 g r}$

C. $\sqrt{2 M g r}$

D. $\sqrt{2 m g r}$

[1]

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Examiners report

Options B and C were selected by a roughly equal number of candidates. Again, this is a situation where unit analysis is beneficial; options C and D would not produce units associated with speed (mass is already incorporated in the constant 'g').

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D. Fields » D.1 Gravitational fields

Question 22M.1A.HL.TZ1.33

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