A simple but descriptive presentation on Forces. Most of the forces are described in this. Photos and the facts have been amde ina manner that is very easy to understand. Impress your teacher with this cool presentation.

1. Don’t fight forces, use them.
Forces

2. What are forces?
A force is a push or pull upon an object resulting from the
object's interaction with another object. Whenever there is
an interaction between two objects, there is a force upon
each of the objects.
Pull Push

3. Unit to measure force and the
equipment used.
Forces are measured in Newtons. And the apparatus
used to measure this is the Newton meter. This
device operates with a spring. The spring attached
onto the scale stretches accurately as the force.
Then the spring represents the data in the ruler.

4. What can forces do ?
A force can do one of four things to an object:
 Make it speed up - accelerate.
 Make it slow down - decelerate.
 Change its direction.
 Change its shape.

5. Plastic and elastic deformation.
Elastic deformation: The material always returns back to it's
original shape, deformation is reversible.
Plastic deformation: The material will no longer return to it's
original shape, it deforms permanently.

6. Hooke's law
Discovered by the English scientist Robert Hooke in
1660, which states that, for relatively
small deformations of an object, the displacement
(stretched amount) is directly proportional to the
deforming force or load. Under these conditions the
object returns to its original shape and size upon
removal of the load.

7. Types of Forces.
Forces can be divided into to two groups such as
contacted and non-contacted forces.
Contacted
Frictional
Force
Tensional
Force
Normal
Force
Air
Resistance
Force
Up thrust
Force
Non-
contacted
Gravitational
Force

8. Frictional Force
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and
material elements sliding against each other.
There are several types of friction:
Dry friction resists relative lateral motion of two solid surfaces in contact. Dry
friction is subdivided into static friction ("stiction") between non-moving surfaces,
and kinetic friction between moving surfaces.
Fluid friction describes the friction between layers of a viscous fluid that are moving
relative to each other.
Lubricated friction is a case of fluid friction where a lubricant fluid separates two
solid surfaces.
Skin friction is a component of drag, the force resisting the motion of a fluid across
the surface of a body.
Internal friction is the force resisting motion between the elements making up a
solid material while it undergoes deformation.

9. Tensional Force
Tension is the pulling force exerted by each end of a string, cable,
chain, or similar one-dimensional continuous object, or by each
end of a rod, truss member, or similar three dimensional object.

10. Normal Force
Normal force is a part of gravitational force. Normal force is a
support force exerted upon an object which is in contact with
another stable object. The normal force of the object is equal to
the force pushing against it.

11. Air Resistance
Air resistance, also called drag, is the forces that are
in opposition to the relative motion of an object
through the air. Drag forces act opposite to the
oncoming flow velocity. Drag, unlike other resistive
forces, depends directly on velocity.

12. Up thrust Force
Up thrust is an upward force exerted by a fluid that
opposes the weight of an immersed object. In a
column of fluid, pressure increases with depth as a
result of the weight of the overlying fluid.

13. Gravitational force
Newton's law of universal gravitation states that
any two bodies in the universe attract each other
with a force that is directly proportional to the
product of their masses and inversely proportional
to the square of the distance between them.
Which means that gravity is measured from
kilograms(Kg).

14. Resultant force

15. I hope that you all learnt something