A horizontal force of 36.0 newtons is used to pull a 40.-newton rubber sled moving toward the left along a horizontal ice sheet. 60-61 Calculate the magnitude of the frictional force acting on the rubber sled. [Show all work, including the equation and substitution with units.] [2]

62 Calculate the magnitude of the net force acting on the rubber sled. [1]

63 Determine the mass of the sled. [1]

64 is the sled accelerating? Explain. If yes, calculate the magnitude of the acceleration of the sled.