Which one of the following is an example of Second Class Lever?
- (a)A pair of scissors
- (b)A bottle opener
- (c)A cricket bat
- (d)A bow and arrow
Correct — B, a bottle opener. In a second-class lever the load lies between the fulcrum and the effort. A cap-lifting bottle opener pivots at one end (fulcrum), lifts the cap (load) in the middle, and is pushed at the far end (effort) — the classic second-class arrangement, like a wheelbarrow or nutcracker.
- (a)A pair of scissors — Scissors are a first-class lever (a double one): the fulcrum (pivot) lies between the effort (fingers) and the load (the material being cut).
- (c)A cricket bat — A bat is used like a third-class lever — the effort (hands) is applied between the fulcrum (top hand/pivot) and the load (ball at the far end).
- (d)A bow and arrow — A bow is not a simple lever of this classification; it stores elastic potential energy, and it is certainly not a second-class lever.
Levers are classified by the relative positions of the fulcrum (F), load (L) and effort (E). First class: fulcrum in the middle (see-saw, scissors, pliers). Second class: load in the middle (wheelbarrow, nutcracker, bottle opener) — these multiply force. Third class: effort in the middle (tongs, fishing rod, human forearm) — these gain speed/range at the cost of force.
Identify where the LOAD sits. In a bottle opener the cap (load) is between the pivot and your pushing hand, making it second class. Scissors are first class; a cricket bat is third class.
- Second-class lever: load between fulcrum and effort (force multiplier).
- Examples: wheelbarrow, nutcracker, bottle opener.
- First-class: fulcrum in the middle (scissors, see-saw).
- Third-class: effort in the middle (tongs, cricket bat, forearm).
- Calling scissors second class — they are first class.
- Confusing force-multiplying (second class) with speed-multiplying (third class) levers.
Asked as classifying a device as a first/second/third-class lever, or giving an example of each.
No directly related past PYQ was found.
- practice — not a real PYQ
Which of the following is a first-class lever?
- (a)Wheelbarrow
- (b)A pair of scissors
- (c)Bottle opener
- (d)Fishing rod
Answer(b) A pair of scissors.
- practice — not a real PYQ
In a second-class lever, which is located between the other two?
- (a)the fulcrum
- (b)the load
- (c)the effort
- (d)none
Answer(b) the load.