Physical Science Chapter 12

   a simple machine consisting of two circular or cylindrical objects fastened together and rotating about a common axis

• fulcrum

• wheel and axle

• inclined plane

• wedge

For a machine that only changes direction the mechanical advantage will be greater than 1.

• True

• False

A machine makes work easier by changing at least one of three factors: the amount of force you exert, the distance over which you exert your force, or the direction in which you exert your force.

• True

• False

The SI unit for power is the watt or joules/second.

• True

• False

The SI unit for work is the watt.

• True

• False

The amount of work done on an object can be determined by multiplying force times distance.

• True

• False

the number of times a machine increases a force exerted on it

• machine power

• mechanical advantage

• mechanical disadvantage

• work rate

    the force the machine exerts

• input force

• output force

• balanced force

• unbalanced force

  the force you exert on the machine

• input force

• output force

• balanced force

• unbalanced force

  a device that allows you to do work in a way that is easier

• tool

• mechanical advantage

• machine

• power generator