Let F1 , F2 , F3 be the forces with magnitude 50N , 10N and 70N respectively. 1. What is the net force in the above diagram ?2. In which direction net force act ? 3. How much force must be added to have zoo net forces ? 4. What is the unit of force ? PLEASE ANSWER MY QUESTION FASTLY... I'LL MARK YOU AS THE BRAINLIEST ANSWER....