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because spanner has a longer moment arm and torque depends upon moment arm greater the moment greater will be the torque produced so it is easy to unscrew a tight nut using longer spanner

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Q: Why is it easier to loosen a tight nut using a long spanner?
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Why does a long spanner make it easier to loosen a stuck nut than a short spanner?

This answer is based on simple mechanics. A spanner is a tool which you use to apply a twisting force on a nut. This twisting force is called a Moment. The equation for a moment: moment = force x distance of application As the force given by your arms will not increase just by using a bigger spanner, the size of the moment is directly related to the distance away from the nut the force is applied. So with a short spanner, say 30cm (0.3 metres) long and a typical force from your arm of about 100N (about 10kg) the moment will be: Moment = 100 x 0.3 = 30 Nm Now if a bigger spanner is used, say 50 cm (0.5 metres) long the moment is: Moment = 100 x 0.5 = 50 Nm So you can see if you use a bigger spanner, you are putting a larger twisting force upon the nut, so it it easier to loosen.


Why is it easy tight a nut using a spanner of long arm than of a short arm spanner?

A long-arm spanner provides greater leverage, making it easier to apply more force to the nut with less effort. This increased leverage allows the user to generate more torque, which makes it easier to tighten the nut effectively. Conversely, a short-arm spanner provides less leverage, requiring more effort to generate the same amount of torque.


Why does using a screwdriver as a lever make it easier to open a paint can?

Using a screwdriver as a lever increases the force applied to the lid of the paint can, making it easier to overcome the resistance and open the can. The lever allows you to exert more torque or rotational force, which helps to loosen the lid.


How do you get the front differential plug off 2000 land rover discovery series 2?

The standard removal technique is to tap the bung with a hammer to loosen it and try to remove it with a single hex spanner or socket, if this does not work try to use a screwdriver in the centre at the same time as using the spanner. It is common for the bung to become stuck if it is done up too tight, if this is the case chisel the bung from the side. The bung will break in half and the tension will be released from the thread and the remainder will unscrew with your hand. If you do this you will obviously need to buy a new bung, I suggest you buy a brass one from a radiator shop. Katie


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How do you increase the moment using a spanner?

Turning force (Moment) measured in Newton metres is equal to Force (Newtons) multiplied by Distance (metres).Or to put it mathematically: Moment (Nm) = Force (N) x Distance (m)The larger the distance the greater the moment.The greater the force the greater the moment.The greater the distance the smaller the force needs to be.This means that a long screwdriver will prise open a paint can lid much easier than a coin will. This also means that a longer spanner will unscrew a nut easier than a small one (or indeed your hands).


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How do you install 88 Dodge Aries Alternator belt?

First you will want to loosen the alternator. To do this you will need to loosen the bolt holding adjustment bolt in place. This is right under the alternator. After loosening this bolt, you can use the adjusting bolt to loosen the alternator and the belt should slide right off. Then you can put on the new belt and tighten the alternator using the adjusting bolt. After the belt is to the proper tightness, tighten the bolt directly underneath the alternator to keep the belt tight and from becoming loose.