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. Rolling friction is smaller than the.
 
2. is a device that is used for measuring the force acting on an object.
 
3. The frictional force exerted by fluids is also called.