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Chapter 4 Work and machines

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Terms in this set (24)

Force exerted on an object that causes it to move.

A unit of work equal to one Newton-meter.

A device that changes the amount of force exerted or the direction in which force is exerted.

The force exerted on a machine.

force exerted on an object by a machine.

Mechanical advantage

The number of times the force exerted on a machine is multiplied by the machine

The percentage of the input work that is converted to output work.

Actual mechanical advantage

The mechanical advantage that a machine provides in a real situation.

Ideal mechanical advantage

The mechanical advantage that a machine would have without friction.

A flat surface with one end higher than the other.

An inclined plane that moves.

An inclined plane wrapped around a central cylinder to form a spiral.

A rigid object that pivots about a fixed point.

The fixed point around which a lever pivots.

Two circular or cylindrical objects that are fastened together and rotate about a common axis.