Advertisements
Advertisements
Question
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Advertisements
Solution
The effort in the centre, the load on one side and the fulcrum on the other side make a lever of the third order.
RELATED QUESTIONS
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
Name six simple machines. Give an example of each machine.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the mechanical advantage of the crowbar.
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
Fig show a system of four pulleys. The upper two pulleys are fixed and the lower two are movable.
(i) Draw a string around the pulleys. Also show the place and direction in which the effort is applied.
(ii) What is the velocity ratio of the system?
(iii) What is the mechanical advantage of the system?
(iv) What assumption do you make in arriving at your answer in part (iii)?
Define Velocity Ratio
Classify the following as a lever, a pulley and an inclined plane:
A staircase
Classify the following as a lever, a pulley and an inclined plane:
Scissors
The idea of a simple machine originated with the Greek philosopher Archimedes.
