PHYSICS....

2.A sled is pulled horizontally across the snow at a constant velocity. The pulling force is 40 N. (5 points) a. What is the Kinetic Frictional Force on the sled? b. If the weight of the sled is 200 N, what is the co- efficient of Kinetic friction between the sled and the snow? c. If 30kg of wood is placed gin the sled, what pulling force is needed to move the sled at a constant velocity? 3. A box slides down a 450 incline with an acceleration of 1.24 m/s2 down the incline. What is the coefficient of kinetic friction between the block and the incline? (5points) 4. A 5.00 kg box is being pulled at constant speed up a 30o incline by a force of 45.0 N parallel to the incline. Determine the coefficient of kinetic friction between the box and the plane. (5 points) 5. A 15.0 kg box is being pulled along level ground by a 75.0 N force that is directed at an angle of 200 above the horizontal. The coefficient of kinetic friction is 0.330. What is the acceleration of the box? (5 points)