Friction Flashcards
1
Q
Which of these are NOT an example of useful friction?
Using shoes for more grip
Using snow chains on tyres
Rockets heating up on re-entry
Using oil on a bike chain as lubricant
A
Rockets heating up on re-entry
2
Q
Which of these is not an example of friction?
A person lifting a heavy object
A car skidding to a halt
A rocket burning upon re-entry to Earth’s atmosphere 
Sliding around on ice
A
A person lifting a heavy object
