A car is traveling along a straight road. After one hour, the car is 72 miles from Chicago. After three hours, the car is 188 miles from Chicago. Determine an equation for the distance, d, the car is from Chicago after h-hours if the relationship between d and h is linear

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.