Physics
Answer
- Scissors : It is a type of class I lever because the fulcrum is between the effort and the load.
- Wheel barrow : It is a type of class II lever because the load is between the fulcrum and the effort.
- Fishing rod : It is a type of class III lever because the effort is between the fulcrum and the load.
Related Questions
Construct a lever using your stationery. What is the effort, load and fulcrum in this case?
Give two more examples of ramps or slopes that make work easier.
Solve the following numericals.
(a) What is the mechanical advantage of a machine that lifts a load of 100 N with an effort of 20 N?
(b) What is the effort required if the mechanical advantage is 9 and the load is 81 N?
Some of the facts that you have learnt till now are listed below. Tick (✓) the facts that are correct and cross (x) the facts that are incorrect.
(a) Efficiency of a machine can be 100%.
(b) A wheel and axle move together.
(c) A wedge is a combination of an axle and inclined plane.
(d) Screw acts as a fastener.
(e) Screwdriver is an example of screw.