Mary is trying to pull Julie on a sled across a flat snowy field. Mary pulls on the rope attached to the sled. Her pulling force is directed horizontally. Julie weighs 76 pounds. The sled weights 12 pounds. If the coefficient of static friction between the sled runners and the snow is 0.3, how much force must Mary pull with (in Ibs) to start moving the sled?

Mary is trying to pull Julie on a sled across a flat snowy field. Mary pulls on the rope attached to the sled. Her pulling force is directed horizontally. Julie weighs 76 pounds. The sled weights 12 pounds. If the coefficient of static friction between the sled runners and the snow is 0.3, how much force must Mary pull with (in Ibs) to start moving the sled?