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Science Vocab Ch. 3
Work and Simple Machines; Lessons 1 - 3
Term | Definition |
---|---|
Work | In science, ... is the transfer of energy to an object by a force that makes an object move in the direction of the force. It is only being done while the force is applied to the object. |
Power | Doing work more quickly, does affect ...-the rate at which work is done. |
Mechanical Advantage | A machine's ... is the ratio of a machine's output force produced to the input force applied. |
Efficiency | The ... of a machine is the ratio of the output work to the input work. |
Simple Machines | Six types of ..., shown in Figure 9, do work using only one movement. |
Lever | The finger tab is a ...-a simple machine made up of a bar that pivots, or rotates, about a fixed point. |
Fulcrum | The point about which a lever pivots is called a ... |
Wheel and Axle | A ... is an axle attached to the center of a wheel and both rotate together. |
Inclined Plane | A ramp, or ..., is a flat, sloped surface. |
Wedge | A sloped surface that moves is called a ... |
Screw | As shown in Figure 16, a ... is an inclined plane wrapped around a cylinder. |
Pulley | The crane uses a ...-a simple machine that is a grooved wheel with a rope or a cable wrapped around it. |