Question

machines help us to do work. a machine is a device that makes work easier. it does this by changing the direction of the force, changing the amount of force, or changing the distance over which the force is being spread. work is defined mathematically as force times distance. machines make work easier by spreading the effort required to do a job over a greater distance. which ramp would require the most force to move a load up to the top? ramp c ramp b ramp a

Explanation:

A ramp is an inclined plane. The steeper the ramp (the smaller the length compared to the height), the more force is required to move a load up it. Among the three ramps (assuming standard setup where Ramp A is the least steep, Ramp B is steeper than A, and Ramp C is the steepest), since force is inversely related to the length of the ramp (for a given height) in the context of inclined - plane mechanics (Work = Force×Distance, and for the same work done (lifting the load to a certain height), if the distance (ramp length) is shorter (steeper ramp), the force is larger).

Answer:

Ramp C