Speed of a coin sliding on a bench with friction

[liam-galvin]

Completely lost on this question, would be brilliant if someone could offer a solution. Thank you

A coin is projected with a speed of 6m/s along the horizontal surface of a bench. The coefficient of friction between the bench and the coin is 0.7. Modelling the coin as a particle and assuming no air resistance, find the speed of the coin after 0.3 seconds

 

[Spinnor]

Does this get you started?