Answer:

Simple Machines are machines that we used in our daily lives.

Differents types of simple machines are lever, pulley, inclined plane, screw, wedges and wheel and axle.

Yes, Simple machines are important because this helps us make our work easier

Answer the following questions on the provided answser sheet on page 7

a. What are simple machines?

b. What are the different kinds of simple machines?

c. Are simple machines important? Why?

Answer:

1.simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. They are the simplest mechanisms known that can use leverage (or mechanical advantage) to increase force. The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

2.An inclined plane consists of a sloping surface; it is used for raising heavy bodies. The plane offers a mechanical advantage in that the force required to move an object up the incline is less than the weight being raised (discounting friction). The steeper the slope, or incline, the more nearly the required force approaches the actual weight. Expressed mathematically, the force F required to move a block D up an inclined plane without friction is equal to its weight W times the sine of the angle the inclined plane makes with the horizontal (θ). The equation is F = W sin θ.

3.The principle of the inclined plane is used widely—for example, in ramps and switchback roads, where a small force acting for a distance along a slope can do a large amount of work.