1. A horse is pulling a wagon, on the back of the wagon is a barrel a.) Draw a free body diagram for 1. The horse. II. The wagon The barrel b. ) Label each force Identify each force 2. Use Newton's first law to explain the following 1. Blood rushes from your head to your feet when riding on a descending elevator which suddenly stops. 11. To dislodge ketchup from the bottom of a ketchup bottle, the bottle is often turned upside down, thrust downward at a high speed and then abruptly halted. 3. For each force diagram, decide if the forces appear to be balanced or unbalanced. Write the expression for the net force in the x- or y-direction. Use the directions right or up as positive. What type of motion will be the result: acceleration or rest/constant velocity? FD Balanced? unbalanced = F-F. Motion? positive acceleration 4. An elevator and its load have a combined mass of 1600 kg and experience a force of gravity of 15680 N. It is initially moving downwards at 12 m/s. Find the tension in the supporting cable when the elevator is brought to rest with a constant acceleration in a distance of 42 m. [ANS 18 000. N]