When the skateboarder reaches the bottom of the ramp, he continues moving with the speed v_f onto a flat surface covered with grass. The friction between the grass and the skateboarder brings him to a complete stop after 5.00 m. Calculate the magnitude of the friction force, F_grass in newtons, between the skateboarder and the grass.
 

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To calculate the magnitude of the friction force Fgrass between the skateboarder and the grass we ca... View the full answer