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Science Vocab Ch. 3

Work and Simple Machines; Lessons 1 - 3

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.
Created by: stemljos4017