Question

Define the terms below: Force and energy

Answer 1

$\mathfrak \red{answer}$

Work and energy:

☞. Whenever a force is applied to an object, causing the object to move, work is done by the force. If a force is applied but the object doesn't move, no work is done; if a force is applied and the object moves a distance d in a direction other than the direction of the force, less work is done than if the object moves a distance d in the direction of the applied force.

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Answer 2

Answer

$\bf\red{ Force }$

Force is an external effort in the form push or pull which

i) produces or tries to produce motion in a body at rest.

ii) Stops or tries to stop a moving body.

iii) change or tries to change the shape and size and the direction of motion of a body.

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$\bf \pink{Definition -}$

"Force is the cause which can produce or tries to produce accelearation in the body on which it acts."

$\implies$SI unit - Newton (N)

$\implies$CGS unit - Dyne

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Effects of force -

$\implies$It can move a stationary body.

$\implies$It can stop a moving body.

$\implies$It can change the speed of moving body.

$\implies$It can change the direction of moving body.

$\implies$It can change the shape or size of a moving body.

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$\bf \red{Energy}$

When a man does a work , he feels tired. He feels that he has lost something which he must regain to work more. Weak man gets exhausted after doing only a small amount of work. A strong man can continue to work for longer duration.

Something that working and losses is called energy.

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$\bf \pink{Definition -}$

Capacity of doing work or total work done by a man is called energy of the man.

$\implies$SI unit - joule

$\implies$CGS unit - erg

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