work done & energy transfer

• what does it mean if a force does work on an object?

  the force causes an object to be displaced through a distance
• work done ( J ) = force ( N ) x distance ( m )
• One joule of work is done when a force of one newton causes a displacement of one metre.
• 1 joule = 1 newton-metre
• Work done against the frictional forces acting on an object causes a rise in the temperature of the object.