540°; 5 rev/sec The coin will take sec to roll 540° and travels approximately mm.

Question

 

540

°

; 5 rev/sec

 

The coin will take 

 sec to roll 540

°

 and travels approximately 

 mm. 

Answer 1

1 revolution is 360° (This is fundamental fact!)

560° is 14 / 9 of a revolution (540 / 360)

1 revolution takes 1/5 of a second

14 / 9 revolutions that (14/9)(1/5) or 14 / 45 of a second.

Now use this model to solve the other posts of this type.