Question

1.
Which of the following is a feature of science of rational mechanics ?
(1) Use of lever
(2) Study of living beings
(9) Cooking food
(4) Study of human behaviour​

Answer 1

Answer:

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Explanation:

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Lever

Levers can be used to exert a large force over a small distance at one end by exerting only a small force(effort) over a greater distance at the other.

Classification Simple machine

Components fulcrum or

Answer 2

Use of lever is a feature of science of rational mechanics.

• Rational mechanics deals with the application of force and its impacts on bodies.
• The use of lever is therefore a feature of rational mechanics.
• The lever is a bar that is used to move the load placed at one end when an effort is applied on the other end. The bar is pivoted somewhere between the load arm and the effort arm which is known as the fulcrum.