Let the students construct a virtual force measurement device and study the force in various cases, e.g. Let the students build springs in Algodoo and study their behaviour. Real springs are damped by internal friction (causes heat- ing of the spring) and the oscillation damps out. A body hanging in an ‘ideal‘ spring can oscillate forever. Discuss the concept of energy stored in a compressed or stretched spring. If the spring is stretched 4 meters, what is the weight? Some spiral springs are constructed so that they can be both compressed (pushed) and stretched (pulled). If you hang 1 kg and the spring stretches one centimeter it will stretch 2 centimeters if you hang 2 kilos etc. There is a relation between how much force you pull with and how stretched the spring becomes. Construct and use a (virtual) device for measuring force.ĭiscuss springs in the class.Build a mental picture for forces based on springs.Knowledge about the relation between force and change in motion.Understand the spring force and the oscillatory motion of objects connected to springs.“If I attach a weight to the system with a spring, will it be stretched or pulled as the system moves?”. This lessons allows the student to study the basic behavior of springs and to construct a force meter to examine the forces in different systems. Springs can also be used as a tool for measuring forces - in which case it is called a Newton Meter. Springs also serves as a mental picture for understanding and predicting forces, e.g. Description: Springs are used in various mechanical devices to give flexibility. Springs are used in various mechanical devices to give flexibility.
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