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# I will be investigating a report on the use of mechanical machines in the workplace. Most machines have one main thing in common; this is that they are used to move things for example screwdrivers

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Introduction

Naz Mariwan Science Coursework Mr Millington Levers Coursework For this Piece of coursework I will be investigating a report on the use of mechanical machines in the workplace. Most machines have one main thing in common; this is that they are used to move things for example screwdrivers; however there are many more, much more complicated things like bikes. Most machines are made up of a number of small simple machines such as levers, pulleys and gears. As machines are used mainly to move things, an effort is needed to move a load from one place to another. Gears A simple gear is chain is a series of interloging cogs with different diameters. When one cog turns, it makes another turn however it turns in the opposite direction and the cogs are fixed to shafts. The mechanical advantage of a machine tells you how big the load is compared to the effort or how much difference a machine makes to the force. ...read more.

Middle

Levers A lever is a bar which is resting on a pivot. If a heavy weight is placed on one end of the lever it can be lifted by applying a certain amount of force to the opposite end. The load is the way it is going to be lifted and the force applied to lift it is called the effort. The force that must be applied to lift the weight should be less that the force that is exerted by the weight. This makes it easier to life the weight but it does not mean that less work has to be done. After work has been done A spanner is a type of lever. Spanners are used by mechanics to tighten levers so that a lever is strong and tight before it is used. My Investigation into the use of Levers Equipment A metre ruler A pivot Various weights (10g, 30g, 50g and 100g). ...read more.

Conclusion

F2 = force applied by the lever to move the lead (f2 = 0.02ml) S1 = distance moved by the effort. S2 = distance moved by the load. Efficient of the lever Work done by the lever x 100 % Work done by the effort = f2x s2 x 100% F1 x s1 As very good scientist result are the main aim of the experiment and recording the result is even more important. Evaluation / Conclusion Overall, out of the whole experiment I enjoyed the theory the most dye to the fact that it improved my knowledge about preparing accurate equipments for this experiment. However, this experiment was way easy. There was nothing to improve the accuracy of the investigation by doing different things. I could use more pivots, giving a wider range of results. My result is reliable and was slightly accurate. ...read more.

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