aquead

If You weigh 690 N. What would you weigh if the Earth were six times as massive as it is and its radius were four times its present value? Answer in units of N. Need help i don't know how this

the tape in a videotape cassette has a total length 256 m and can play for 2.3 h. As the tape starts to play, the full reel has an outer radius of 38 mm and an inner radius of 13 mm. At some point during the play, both reels will have the same angular spe...