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प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
विकल्प
True
False
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उत्तर
False.
There are six types of simple machines.
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संबंधित प्रश्न
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Answer the following.
What is a machine?
What is the purpose of a jack in lifting a car by it?
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
What is the efficiency of an ideal machine?
How does a machine work?
Give an example of the following use of a machine to obtain gain in force.
Give an example of the following use of a machine to change the direction of force.
Classify the following as a lever, a pulley and an inclined plane:
A knife
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.
