Absorb Nutrients
 Mechanically and chemically breaks
down food
 Convert food into energy


Chemical because it changed into
something new.

The chewing of food makes the pieces
of food smaller

Plants, Trees, grass, shrubs
You start with Chemical energy from the
food
 To Thermal energy for heat
 And Mechanical energy for movement.

He did do work on the 200N weight
 He did not do work on the 400N weight


Allows Movement.

Add a book to make the ramp more
steep.

2 * 50 = 100J

Zero work was done because the force and
motion were in different directions.

The amount of work. The distance
increased but the force required
decreased.