Mechanics sometimes use a piece of pipe to lengthen the handle of a wrench when trying to remove a very tight bolt.How does this make it easier for the mechanic to remove the bolt?  Group of answer choicesIt increases the torque the mechanic can apply, without the need to exert a greater force.It increases the force exerted by the mechanic, without the need to apply a greater torque.It allows the mechanic to apply the same torque, while decreasing the force.It allows the mechanic to exert the same force, while decreasing the torque.

The correct answer is: "It increases the torque the mechanic can apply, without the need to exert a greater force."

Here's why:

1. Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis, which we will call the pivot point, and will label 'O'. We calculate torque by using the formula: torque = force x distance

2. In this case, the wrench is the object that is rotating about a pivot point 'O'. The force is applied by the mechanic at the end of the wrench.

3. When the mechanic uses a piece of pipe to lengthen the handle of the wrench, the distance from the pivot point where the force is applied is increased. This means the wrench handle is longer, so the distance in the torque formula is greater.

4. According to the formula (torque = force x distance), if distance increases, then torque also increases if the force remains the same.

5. Therefore, by using a longer wrench (or extending the length of the wrench with a piece of pipe), the mechanic can increase the torque, or turning force, that is applied to the bolt. This makes it easier to remove the bolt, without the mechanic needing to exert a greater force.