F=ma=-umg
a=-ug
=-0.7×10
-7m/s
V=u+at
V= 6m/s+(-7×0.3)
V=6-2.1
V=3.9m/s
A coin is projected with speed 6m s-1 (metres per second) along the horizontal surface of a bench. The coefficient of friction between the coin and the surface is 0.7. Modelling the coin as a particle and assuming no air resistance, find the speed of the coin after 0.3 s.
1 answer