1. Collision of two railway trucks, determination of common speed post-collision, and impulse on the moving truck. 2. Uniform rod in equilibrium, finding the largest mass for a particle and tension in a string. 3. Particle on an inclined plane, force required to keep it in equilibrium and frictional force. 4. Lift acceleration and mass of a person inside, based on tension and forces acting. 5. Vertical motion of a ball, distance traveled below a certain speed and time spent moving faster than its initial speed. 6. Force applied to a particle on a horizontal plane, finding unknown constants and particle′s speed after a set time.