The three specific situations in which machines make work easier are pulleys used in lifting, levers used in construction work, and the screw jack used in various situations such as changing the tier of a car
What is the mechanical advantage?
Mechanical advantage is defined as a measure of the ratio of output force(load) to the input force(effort) in a system, It is used to analyze the forces in simple machines like levers and pulleys.
Mechannical advantage = load / effort
The greater the mechanical advantage is the more effective the machine and it's easy to difficult mechanical work in various situations.
The pulleys are used in the lifting of heavy bodies in the rope pulley mechanical system.
The lever is used in construction work by the construction workers to hold and uplift heavy machines and materials.
The screw jack is used to for changing the tier of a car by lifting and locking the position.
Learn more about Mechanical advantages, here
brainly.com/question/16617083
#SPJ2
