PDF chapter test TRY NOW

Choose the right word(s) from the given box to complete the sentences:
 
walk 
heat
 soles of our shoes
friction
treads 
doctor
drag
spring balance
 sliding friction
 object at rest
sliding over another
magnet
  
1. Friction destroys the.
 
2. opposes the relative motion between the surfaces
 
3. The force required to overcome friction when an object starts moving from rest is a measure of .