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5th Grade Science
Simple Machines
Question | Answer |
---|---|
Simple Machine | A mechanical device that changes the direction or magnitude of a force. |
Machine | A tool containing one or more parts that uses energy to perform an intended action. |
Inclined Plane | A ramp or a blade, set at an acute angle to a horizontal surface, |
Wedge | An object with at least one slanting side ending in a sharp edge, which cuts material apart. Made from two inclined planes |
Pulley | A simple machine that uses grooved wheels and a rope to raise, lower or move a load. |
Lever | a stiff bar that rests on a support called a fulcrum which lifts or moves loads. |
Fulcrum | The point on which a lever rests or is supported and on which it pivots. |
Wheel and axle | A wheel with a rod, called an axle, through its center lifts or moves loads. |
Screw | An inclined plane wrapped around a pole which holds things together or lifts materials. |
Work | When a force that is applied to an object moves that object. |
Potential energy | Energy that is stored |
Kinetic Energy | Energy of motion |