Force and Friction

12345
Across
  1. 2. what friction opposes
  2. 3. with what friction is decreased
  3. 4. most machines with moving parts use this
  4. 5. is the force with which the earth pulls everything towards it self
Down
  1. 1. caused by interlocking on the surfaces in contact
  2. 2. when you lift your school bag or kick a football you use this force