# Force and extension experiment coursework

Everybody knows that when you apply a force to a spring or a rubber band, it stretches. A physicist would ask, "How is the force that you apply related to the amount of stretch? Students must wear eye protection.

• Young's Modulus of Wire Experiment Coursework - The Student Room

Eyes may be at the same level as clamp and the nail. Also, steel springs store more energy than copper springs and can fly off their supports. Students will stretch springs beyond their elastic limit and replacements will be necessary.

This is not willful destruction but, rather, good science. If the springs are supplied close-coiled it is better to have the coils separated before issuing them to the students. Hanging about g gently on the tightly coiled springs will do this. Hang a spring from it and secure it so that it does not fly off.

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The number of masses hanging from the spring is 0 and the extension of the spring is 0 cm. Record the new metre rule reading, the number of masses 1 and the extension of the spring.

Record the new metre rule reading, the number of masses 2and the total extension of the spring from its unstretched length. To do this fully, you will Force and extension experiment coursework to plot a graph. Plot the number of masses on the horizontal axis, since it is the input or independent variable. The extension of the spring is the output or dependent variable and you should plot it on the vertical axis. There is benefit in doing both, since it will invite discussion and thought on the nature and use of graphs.

This relates to the shape of the graph, whether it is sometimes or always a simple straight line passing through the origin. It thus leads to the concept of proportionality. Proportionality, or linearity, describes a simple form of relationship between variables.

This relationship is common in nature. Much of physics is devoted to seeking such simplicity. Hooke's law states that, up to a limit, extension is proportional to load. When the load is doubled then the stretch is doubled. Robert Hooke noticed this very simple pattern in Since he was worried that others, maybe even Newton, would steal the credit for this he wrote in code at first, and created an anagram: The fact, though, that Hooke's law is only obeyed by materials up to a limit highlights the fact that nature does not always offer simplicity.

Point out that engineers must understand the behaviour of springs.

## Extension vs Force Experiment

Comparison of graphs provides opportunity for discussion. Include among the equipment available for this experiment a second boss and clamp as well as a set square for each student group. Either prompt a discussion initially or leave the students to work out how these extra items might be useful.

They can also use the set square to make sure that the clamped ruler is vertical in relation to the bench. Students might set the clamped ruler at 0 cm when no masses are added and so read the extension directly. This procedure helps them avoid simple mistakes that arise when measuring lengths and then calculating extensions. These refinements provide good illustrations of improving an experimental method.

You could also ask them to predict what they expect to happen qualitatively and perhaps even quantitatively. Stretched rubber exhibits elastic hysteresis. This experiment was safety-checked in January "Hooke's Law" is about stretching springs and wires.

 Investigating simple steel springs Graph based on the final experiment results: Investigating simple steel springs When we apply a force to a spring, it stretches. If we apply double the force, it stretches twice as much, so long as we don't over-do it. 2- Stretching | IGCSE Physics This collection of force and motion ideas should help you cover the topics of texture, gravity, incline and some simple machines. Force - extension experiment - benjaminpohle.com Everybody knows that when you apply a force to a spring or a rubber band, it stretches. A physicist would ask, "How is the force that you apply related to the amount of stretch?

When we apply a force to a spring, it stretches.. If we apply double the force, it stretches twice as much, so long as we don't over-do it.. So far, this is pretty obvious. Conclusion: In this experiment, the stretch of a spring changes as the force applied on the spring changes.

As the stretch increases, the force increases, and it is a constant increase. During the conduction of this lab, several new phrases that were defined came up: extension, Hooke’s law, the spring constant, the percent difference, and the E el %(2).

5 How Science Works extension: Include among the equipment available for this experiment a second boss and clamp as well as a set square for each student group. Either prompt a discussion initially or leave the students to . Teach force and motion with style by using experiments, free printables and resources that will help bring science concepts alive.

This collection of force and motion ideas should help you cover the topics of texture, gravity, incline and some simple machines.

Jul 17,  · Best Answer: Hooke's Law: The force applied to a spring to stretch it a certain distance is proportional to that distance. F = kx k - constant x - stretched distance This force represents the force applied.

Often, equations are written with respect to the system instead of the benjaminpohle.com: Resolved. The extension of a spring is directly proportional to the force pulling it, provided that the limit of proportionality is not exceeded. In equation form, where is spring constant and is the extension .

Force vs. Stretch Experiment