Physics
Differentiate between class I, class II and class III lever. Give examples if applicable.
Answer
| S. No. | Class I lever | Class II lever | Class III lever |
|---|---|---|---|
| 1. | In class I lever, the fulcrum is between the effort and the load. | In class II lever, the load is between the fulcrum and the effort. | In class III lever, the effort is between the fulcrum and the load. |
| 2. | The mechanical advantage can be greater than, equal to or less than 1. | The mechanical advantage is always greater than 1. | The mechanical advantage is always less than 1. |
| 3. | Example : scissors, pliers and see-saw. | Example : bottle opener, wheel barrow and nutcracker. | Example : fishing rod, knife and broom. |
Related Questions
Match the columns.
Column A Column B 1. Fixed support in a lever (a) Door stopper 2. Children's slide (b) Screw driver 3. Fixed pulley (c) Fulcrum 4. Wheel and axle (d) Well 5. Wedge (e) Inclined plane Give reasons for the following statements.
(a) Work done by a standing man is zero.
(b) A simple machine neither provides energy nor does any work.
(c) Mechanical advantage of class II lever is always greater than 1.
(d) Effort depends on the steepness of inclined plane.
(e) Efficiency of a machine cannot be 100%.
Differentiate between fixed pulley and movable pulley. Give examples if applicable.
Differentiate between inclined plane and screw. Give examples if applicable.