What is the acceleration due to gravity on the surface of a planet that has radius half that Earth?

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The Indian Air Force (IAF) is soon be going to release the official notification for the IAF STAR 01/2023 in the first week of November 2022.  The selection of the candidates depend on three stages which are Online Written Test, Physical Fitness Test, and Medical Examination. The exam is scheduled in mid week of January 2023. The candidates who qualified for all the stages and selected for the Air Force Group X posts will receive a salary range between Rs. 21,700 to Rs. 57,500. With 12th Pass & Diploma as the basic educational qualification, this is one of the most sought jobs. Candidates can check the Airforce Group X eligibility here.