Three types of levers. Levers can be classified as first, second, or third class, depending on how the load force (F(vector)L) and effort force (F(vector)E) are configured with respect to the pivot point or fulcrum as shown in Figure Q8.11. Determine the lever classification of the following items: (a) a crowbar, (b) a pair of pliers, (c) a clawed hammer pulling a nail, (d) a wheelbarrow (Fig. P8.37), (e) a seesaw (Fig. 8.10), (f) a fishing pole, (g) a light switch, (h) a gate with closing spring attached to hinge, and (i) biceps raising the forearm (Fig. P8.79).

Figure Q8.11

Transcribed Image Text:

FE FEA First-class lever Second-class lever Third-class lever