VOCABULARY 1 Simple Machines. Demonstrate the effect of simple machines (lever, inclined plane, pulley, wedge, screw, and wheel and axle) on work. S8P5c.

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Presentation transcript:

VOCABULARY 1 Simple Machines

Demonstrate the effect of simple machines (lever, inclined plane, pulley, wedge, screw, and wheel and axle) on work. S8P5c

Introduction

The scientific definition of work is: using a force to move an object a distance (when both the force and the motion of the object are in the same direction.) v=dYR5lsIEC4I v=dYR5lsIEC4I 1. Work

5 Formula for work Work = Force x Distance The unit of force is newtons The unit of distance is meters The unit of work is newton-meters One newton-meter is equal to one joule So, the unit of work is a joule

The standard unit of energy in electronics and general scientific applications. One joule is defined as the amount of energy exerted when a force of one newton is applied over a distance of one meter. 2. Joule

In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. In the SI system, the unit of power is the joule per second (J/s). 3. Power

A simple machine consisting of a bar that pivots on a fixed support, or fulcrum, and is used to transmit torque. A force applied by pushing down on one end of the lever results in a force pushing up at the other end. 4. Lever

The fixed point around which a lever pivots. 5. Fulcrum

An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other. It is used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists Inclined Plane

A machine consisting of a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load. Combinations of two or more pulleys working together reduce The force needed to lift a load Pulley

An inclined plane that moves to do its work. Usually Triangular shaped used to separate or split something with force Wedge

It is similar to an inclined plane. When you twist a screw into wood you exert an input force on the screw Screw

A wheel and axle is really two machines in one because you can use each part in different ways. The axle is the object that attaches the wheel to the object it's moving. The first Use is to roll something along. The Second use is like a lever in the round. A door knob or a faucet on a sink are really round levers, and the "fulcrum" is in the middle where the axle turns Wheel and Axle

Conclusion

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