Advertisements
Advertisements
प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
A staircase
उत्तर
A staircase – An inclined plane
संबंधित प्रश्न
What do you understand by a machine?
Answer the following.
What is a 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.
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.
What is an ideal machine?
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.
Give an example of the following use of a machine to change the point of application of the force.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Why is this so machines have to be maintained?
