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प्रश्न
Give an example where a machine is used to obtain gain in speed.
उत्तर
In automobiles, gear arrangement system (machine) is used to obtain gain in speed.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
When is work said to be done by a force?
What care would you take to increase the life span of a machine which you use?
Give an example of the following uses of a machine:
to obtain gain in speed
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 obtain gain in force.
Classify the following as a lever, a pulley and an inclined plane:
A slide
Why is this so traveller’s bags have wheels?
______ help us to make work easier.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
