A 150 kg dog sled is pulled along the Iditarod trail in Alaska. The sled is pulled horizontally from rest with an acceleration of 1.5 m/s2. What is the tension force on the sled if the friction force between the sled runners and the snow is 40 N.

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.