हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 6

Answer the Following in Short. Mention Any Two Methods by Which We Can Take Care of Machines. - Physics

Advertisements
Advertisements

प्रश्न

Answer the following in short.

Mention any two methods by which we can take care of machines.

संक्षेप में उत्तर

उत्तर

Taking care of machines: Some of the ways in which machines should be cared for are given below.

  1. Machines should be kept in a clean environment, which is free from dust and moisture.
  2. When not in use, machines should be kept covered to prevent the collection of dust on them.
  3. Machines made of iron should be protected from rust by coating them with paint.
  4. The moving parts of a machine should be regularly oiled with good-quality machine oil to reduce friction and wear and tear.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Simple Machines - Exercises 4

APPEARS IN

सेलिना Concise Physics [English] Class 6 ICSE
अध्याय 4 Simple Machines
Exercises 4 | Q 6

संबंधित प्रश्न

What care would you take to increase the life span of a machine which you use?


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.


Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.


The mechanical advantage of an inclined place is always:
(a) less than 1
(b) equal to 1
(c) greater than 1
(d) nothing can be said


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)?


Give an example of the following use of a machine to change the direction of force.


A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?


The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.


Which machine will you use to do the following work? Write their type.

To lift bricks to the top of a tall building.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×