This document defines force and describes its types. It states that force is a push or pull on an object that can cause it to change its velocity or motion. There are two main types of forces: contact forces that require touching and non-contact forces that act over a distance. The document also provides the formula for calculating force as mass times acceleration and gives examples of calculating the net force required to accelerate objects with given masses and accelerations.

1. FORCE AND IT’S TYPES
SAIFEE EIDI ZAHABI INSTITUTE OF SCIENCE AND
TECHNOLOGY

2. What is Force?

3. What is Force?
Push or pull of an object is considered a force. Push and pull come from the
objects interacting with one another. Terms like stretch and squeeze can also be
used to denote force.
The push or pull on an object with mass causes it to change its velocity.
Force is an external agent capable of changing a body’s state of rest or motion. It
has a magnitude and a direction. The direction towards which the force is applied
is known as the direction of the force, and the application of force is the point
where force is applied.

5. The Force can be measured using a spring balance. The
SI unit of force is Newton(N).

6. What are the Effects of Force?
In physics, motion is defined as the change in position with respect to
time. In simpler words, motion refers to the movement of a body.
Typically, motion can either be described as:
1. Change in speed
2. Change in direction

7. The Force has different effects, and here are some
of them
1. Force can make a body that is at rest to move.
2. It can stop a moving body or slow it down.
3. It can accelerate the speed of a moving body.
4. It can also change the direction of a moving body along with its
shape and size.

9. Formula for Force
The quantity of force is expressed by the vector product of mass (m) and
acceleration (a). The equation or the formula for force can mathematically be
expressed in the form of:
Where,
•m = mass
•a = acceleration
It is articulated in Newton (N) or Kgm/s2.
Acceleration a is given by a = v/t

10. Unit of Force
•In the centimeter gram second system of unit (CGS unit) force is
expressed in dyne.
•In the standard international system of unit (SI unit) it is expressed
in Newton (N).
The SI unit of force. It is equal to the force that would give
a mass of one kilogram an acceleration of one meter per
second per second, and is equivalent to 100,000 dynes.

11. Types of Force
Force is a physical cause that can change an object’s state of motion or
dimensions. There are two types of forces based on their applications:
1. Contact Force
2. Non-Contact Force

13. How much net force is required to accelerate a 1000 kg
car at 4.00 m/s2?
Solution:
Given,
a = 4.00 m/s2
m = 1000 kg
Therefore,
F = ma
= 1000 × 4
= 4000 N

14. Saleem has a toy car mass of 2 kg. How much force
should he apply to the car so that it should travel with
the acceleration of 8 m/s2?
Solution:
Known,
m (Mass of toy car) = 2 Kg,
a (Acceleration) = 8m/s2,
F is Force to be applied by Saleem = m × a
= 2 Kg × 8 m/s2 = 16 Kgm/s2 = 16 N.

15. ANY QUESTIONS?

16. THANK YOU