Please choose the correct answer to the question: Two people are pushing a car. One person is pushing with a force of 450 N and the other person is pushing with a force of 300 N. What information is needed to determine the net force applied to the car by the people?

Answer1: the direction of the road Answer2: the direction of the forces Answer3: the weight of the two people Answer4: the weight of the automobile

Answer format: answer1/answer2/answer3/answer4