Study the diagram of the complex machine below, and answer the questions that follow. Ramp height 12 inches Length of crank handle = 36 inches Radius of crank axle = 6 inches A. Rope wrapped around axle attached to box Ramp length = 60 inches 1. What two simple machines make up the complex machine? lever Weight of box = 495 lbs B. inclined plane 2. What is the mechanical advantage of the complex machine? Hint: add the mechanical advantages of the two simple machines. MA-30 MA length Theight 60 la MA-11 JP=5 1=60 3. How much force (weight) must be applied to the handle of the crank to pull the box up the ramp (assume no friction)? 4. What is the efficiency of the machine if it requires 50 lbs force on the handle to pull the box up the ramp? NOTWI 100