Advertisements
Advertisements
प्रश्न
Identify and mention the types of simple machines.
 |
 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
Advertisements
उत्तर
|
|
|
| Wedge | Inclined plan | Lever |
|
|
|
| Wheel and axle | Pulley | Screw |
APPEARS IN
संबंधित प्रश्न
Name six simple machines. Give an example of each machine.
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
The diagram below shows a wheel barrow. Mark position of fulcrum F and draw arrows to show the directions of load L and effort E. What class of lever is the whell barrow? Give one more example of the same class of lever.
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)?
Comment on the statement ‘The mechanical advantage of a machine is greater than 1’. Give an example of a lever mechanical advantage is:
(i) greater than 1.
(ii) Equal to 1.
What is the efficiency of a machine?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
Why is this so machines have to be maintained?
