PHYSICS [1 Mark Question Answer]

Force (F) = 50N
Work done (W) = 25J
Work done (W) = Fx
25 = 50x
x = 25/50
x = 0.5 m

Work done (W) = 800J
Displacement (S) = 10m
Work done (W) = F × S
800 = F × 10m
F = 80N

Force (F) = 25N
Displacement (S) = 4m
Work done (W) = F × S
= 25N × 4m
W= 100 J

In other words, energy is the form of work that is stored and work is the one that is used. Therefore, work and energy, while not synonyms, are consistent with respect to the object. So they both have the same SI unit.

SI unit of work is “Joules”.

W = f . D

When a person push a wall.
Tug of war, equal force on both sides.

If there is displacement due to force, than we say that work is done.

In everyday language, any physical or mental activity may not be regarded as work. For example, When we talk or think our brain is working meant our brain is doing mental work but there is no displacement in this process. Then we can say, there is no energy spent on thinking or talking.

Work is said to be done only when the force applied to a body causes a change in the position of an object. Take an example as the objects, the car, the heavy box, and the football change their position when force is applied to them.

Ability to do work, which is the ability to exert a force causing displacement of an object.c

The SI unit of work or energy is joule.

A headmaster giving a speech in a school assembly mental work.

Work is done when a force causes displacement at not right angles to its own direction.

Work done by a body is the product of force and displacement.

Work is not done when we hold a pile of books on our hands.