This PowerPoint relates to the INTERACTIONS BETWEEN OBJECTS of the Physics 2 specification. Students should:

appreciate that forces arise between objects and that the forces on the two objects are equal and opposite

know that when a force acts on a moving body, energy is transferred although the total amount of energy remains constant.

select and use the equation: work = Force × distance to calculate work / energy transfer, force or distance.

Higher Level - select and use the equations to calculate kinetic energy and change in potential energy

apply the principles of forces and motion to the safe stopping of vehicles, including knowledge of the terms reaction time, thinking distance, braking distance and overall stopping distance and discuss the factors which effect these distances.

apply the principles of forces and motion to an analysis of safety features of modern cars: air bags and crumple zones.

discuss the reasons for introducing speed restrictions and speed cameras to promote road safety.