Please choose the correct answer to the question: Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?

Answer1: ball with a mass of 5 kg Answer2: ball with a mass of 10 kg Answer3: ball with a mass of 15 kg Answer4: ball with a mass of 20 kg

Answer format: answer1/answer2/answer3/answer4