Work and Machines Crossword Puzzle

QUESTIONS LIST:

• work : occurs when a force causes an object to move in the direction of the force.
• lever : a simple machine that consisting of a bar that pivots at a fixed point
• screw : an inclined plane that is wrapped in a spiral
• input : the type of work that you do on a machine is called the work
• efficiency : mechanical _ is a comparison of a machine's work output with the work input.
• block and tackle : when two kinds of pulleys are used together, a system is called a
• advantage : the mechanical _ of a machine compares the input force with the output force.
• joule : unit used to express work
• pulley : a simple machine that consists of a grooved wheel that holds a rope or cable.
• machine : a device that helps make work easier by changing the size or direction of force.
• wedge : a simple machine that consists of a straight, slanted surface.
• simple : all machines are constructed from six _ machines.
• wheel and axel : a simple machine consisting of two circular objects of different sizes.
• fulcrum : the fixed point at which a lever pivots is called a
• compound : machines that are made up of two or more simple machines is called a _ machine
• watt : the unit used to express power
• output : the work done by a machine is called work _ .