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प्रश्न
Give an example of the following use of a machine to obtain gain in force.
उत्तर
Lifting a car with a jack.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
Write the relation between mechanical advantage, velocity ratio and efficiency.
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
What is a lever? How are the orders of the lever determined?
