How do you solve this problem? An object of mass 0.5 kg is thrown straight upward with an initial speed of 8 m/s. Its total flight time - from release to impact - is 3s. From what height was the object thrown? (Ignore effects due to the air.) I am not a physics student. I am a virologist who is trying to learn general physics for tutoring purposes. Just thought this would be a good place to post. Thanks!