By winning his four events, Owens, at the age of 21, tied the world 100-meter dash record at 10.3 seconds, set Olympic records for the 200-meter dash (20.7 seconds) and the broad jump* (26' 5 1/4), and ran the first leg for the Olympic and world record-setting 400 meter relay team (39.8 seconds).
If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion. A net force = unbalanced force. If however, the forces are balanced (in equilibrium) and there is no net force, the object will not accelerate and the velocity will remain constant.. Unbalanced Forces: Placing a box on the seesaw unbalances it.
Kinetic friction is often an unbalanced force acting on moving objects. Thus, kinetic friction often changes the velocity of a moving object by slowing down the object. Static Friction Often, a force is applied to an object but does not cause the object to move. The object does not move because the force of static friction is balancing the force applied. Static friction can be overcome by applying a large enough force. As soon as an object starts moving, static friction has gone and has been replaced by kinetic friction. Look at Figure 4 to understand when static friction affects an object.