Advertisements
Advertisements
प्रश्न
What is meant by simple machines?
Advertisements
उत्तर
Machines that have only one or two parts are called simple machines. Their structure is easy to understand and use. Examples include the nail cutter, bottle opener, and wheel used to push loads, etc.
संबंधित प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
What is an ideal machine?
What is the purpose of a jack in lifting a car by it?
What is an ideal machine?
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 scientific reason for the following:
Passengers in a bus are pushed backward when it starts suddenly.
Define simple machine.
What is the efficiency of an ideal machine?
Classify the following as a lever, a pulley and an inclined plane:
A needle
Why is this so machines have to be maintained?
