Interactive - Unit 9. Lesson 6. Newton's third law of motion - Practice class

Click here to read the information on the link (optional). Then solve the problems. Show your work to have credits. I. Solve the problems1. A person of mass 85 kg is standing on . Explain the forces acting on the person and calculate the force the person exerts on the floor of the lift. 2. Challenge! Now imagine that in the previous problem the lift is accelerating downwards at 0.45 m . Explain the forces acting on the person and calculate the force the person exerts on the floor of the lift. (Hint: subtract the opposite force of the lift from the force exerted by the person) 3. How much force would a sand bag exert on you when you hit with a force of 150 N? If the sand bag has a mass of 80 kg, what would its acceleration be? 4. Challenge! A 15-kg small boy crashes against a 32-kg bigger boy. If the accelaration of the smaller boy is 5 m backwards, what is the accelaration of the bigger boy and in what direction?