Which of the simple mechanisms gives you the smallest performance gain? a) a lever c) a movable block

Which of the simple mechanisms gives you the smallest performance gain? a) a lever c) a movable block b) an inclined plane d) a fixed block e) a simple mechanism does not bark a gain in work

Let’s consider all the mechanisms. A lever – a body with an axis of rotation – gives an advantage in strength or distance N times. The movable block gives a 2-fold decrease in strength. The fixed block does not give any gain and only serves to change the direction of the force application. The inclined plane also reduces the required force by a number of times, which depends on the ratio of length and height.

Which of the following mechanisms provides the greatest strength gain? To answer you need to refer to the golden rule of mechanics: no mechanism can give a gain in work; a decrease in strength always entails an increase in distance and vice versa. The correct answer is “е”.