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Description
Flashcards by Jorge Andrés Luna Suquilanda, updated more than 1 year ago
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Created by Jorge Andrés Luna Suquilanda
over 3 years ago
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| Question | Answer |
| FORCE | Strength or energy as an attribute of physical action or movement. |
| MOVEMENT | The action or process of moving especially. For example: when you go from place to place and accomplish different tasks. |
| FRICTION | Is a force between two surfaces that slows down moving objects. Friction happens when two things rub against each other. For example: a football and the ground. |
| SPEED | Speed tells us how fast something moves. To calculate speed, we divide the distance by the time it takes to travel this distance. |
| SIMPLE MACHINES | Machines that modify the action of forces. For example: the wheel, the pulley, the lever or the inclined plane. |
| MOTOR / ENGINE | This component produces movement. Motors run on electrical energy. Engines run on chemical nergy from fuel. |
| GRAVITY | Is the force which attracts all bodies towards the Earth's surface. |
| GEARS | These are wheels with teeth. They help to produce movement inside machines. |
| CRANKS | These are levels that turn in circles. They are used in some manual machines to start movement. |
| DOME STRUCTURES | A dome is created from multiple arches or vaults, which are connected in a symmetrical manner to form a sound structural entity. Domes are usually circular. |
| THERMOSTATS | These allow us to regulate the temperature in our homes and to avoid wasting energy. |
| APPLIANCES | Refrigerators, washing machines, dishwashers or vacuum cleaners reduce the time and energy we spend on daily tasks. |
| FIRST-CLASS LEVERS | The fulcrum is between the load and the energy moving the force. Crowbars, pliers and scissors are examples of first-class levers. |
| SECOND-CLASS LEVERS | The fulcrum is at one end and the load is between the fulcrum and the force. Guillotines, wheelbarrows and nutcrackers are examples of second-class levers. |
| THIRD-CLASS LEVERS | The force is applied between the fulcrum and the load. Your arm and some types of cranes are examples of third-class levers. In your arm, the fulcrum is your elbow. The force is applied by your muscle. |
| WHEEL | The wheel is a simple machine, but it can be used as a component of complex machines. It consists of a round part which turns on an axle. |
| AIR RESISTANCE | Friction happens when two objects rub against each other, for example, a moving ball and the ground. when an object moves against a gas, we call it resistance. |
| WATER RESISTANCE | Friction happens when two objects rub against each other, for example, a moving ball and the ground. when an object moves against a liquid or a gas, we call it resistance. |
| COMPLEX MACHINES | Is a machine made up of two or more simple machines that make your work easier to do. |
| ELECTRICAL CIRCUITS | These carry electricity to the motor and other parts. circuits can only work when they are connected to mains or when they have batteries. |
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