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प्रश्न
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
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उत्तर
To remove the lid of a tin, a tin opener or can opener, which is a second-order lever machine, is used.
संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
What is an ideal machine?
Why is a machine not 100% efficient?
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.
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
Give an example of the following uses of a machine:
to obtain gain in speed
Define Efficiency
Give an example of the following use of a machine to change the direction of force.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
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.
