The mechanical advantage of an inclined plane is the ratio of the inclined surface to the vertical height. simple machines with greater mechanical advantage reduce the force required to lift a load. in which case is the effort required the least? a) raising a 100 kg box to a height of 1 m using an inclined plane of length 5 m b) raising a 100 kg box to a height of 2 m using an inclined plane of length 6 m eliminate c) raising a 200 kg box to a height of 1 m using an inclined plane of length 4 m d) raising a 200 kg box to a height of 2 m using an inclined plane of length 8 m