A hockey puck of mass 0.26 kg issliding along a slippery frozen lake, with an in

Question

A hockey puck of mass 0.26 kg issliding along a slippery frozen lake, with an initial speed of55 m/s. The coefficient of frictionbetween the ice and the puck isK = 0.032. Friction eventually causes the puck to slide toa stop. Find the work done by friction. my question is how can i find the x? thedisplacement. A hockey puck of mass 0.26 kg issliding along a slippery frozen lake, with an initial speed of55 m/s. The coefficient of frictionbetween the ice and the puck isK = 0.032. Friction eventually causes the puck to slide toa stop. Find the work done by friction. my question is how can i find the x? thedisplacement.

Explanation / Answer

           Giventhat the mass of puck is m = 0.26 kg           initial speed is u = 55 m/s           Thecoefficient of friction between the ice and the puck isK = 0.032.    final speed is v = 0m/s ------------------------------------------------------------------------------------- If the body moving on rough horizontal plane theacceleration is a = - k*g ( Only forceacting is friction )    thenthe displacement is x = ( v2 -u2) / 2a                                                                               = --------- m Then the work done due to friction                            W = f *x                                  = k*mg*x                                  = ----------- J

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