Question

B. Give one word for the following.
1 The point about which a lever can turn
2. Force applied to a machine
3. Useful work done by the machine
4 A combination of two or more inclined
planes
5. Distance through which a screw advances in
one complete rotation​

Answer 1

Answer:

find the attachment

Explanation:

mark as brainlist answer

Answer 2

Throughout history, humans have developed several devices to make work easier. The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw, and the wedge, although the latter three are actually just extensions or combinations of the first three.

Because work is defined as force acting on an object in the direction of motion, a machine makes work easier to perform by accomplishing one or more of the following functions, according to Jefferson Lab:

transferring a force from one place to another,

changing the direction of a force,

increasing the magnitude of a force, or

increasing the distance or speed of a force.

Simple machines are devices with no, or very few, moving parts that make work easier. Many of today's complex tools are just combinations or more complicated forms of the six simple machines, according to the University of Colorado at Boulder. For instance, we might attach a long handle to a shaft to make a windlass, or use a block and tackle to pull a load up a ramp. While these machines may seem simple, they continue to provide us with the means to do many things that we could never do without them.