In a shuffleboard game the puck slides a total of 10 m on a

In a shuffleboard game, the puck slides a total of 10 m on a horizontal surface before coming to rest. If the coefficient of kinetiefriction between the puck and board is 0.015 what was the initial speed of the puck? A 15-kg block is on a frictionless ramp that is inclined at 20 degree above the horizontal. It is connected by a very light string over an ideal pulley at the top edge of the ramp to a hanging 19-kg block, as shown in the figure. The string pulls on the 18-kg block parallel to the surface of the ramp. Find the magnitude of the acceleration of the 19-kg block after the system is gently released?

Solution

6.

the initial speed is calculated as follows:

   v₀ = sqrt[2ugs] = sqrt[2*0.15*9.8*10] = 5.422 m/s