Question

In: Physics

An object of mass m with a certian initial speed on a horizontal surface comes to...

An object of mass m with a certian initial speed on a horizontal surface comes to rest after traveling a distance of 15m. If the coefficient of friction is .25, what is the initial speed of the object? Use g= 10m/s^2

Solutions

Expert Solution

Given Data

                  s=15m

                  =0.25

The total kinetic energy converted into frictional force

                   (1/2)mv^2=mgs

                            v^2=2gs

                                    =2*10*0.25*15

                                    =75

                               v    =8.66 m/s^2


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