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201201797
TN
MBHAMALI

PHYSICAL SCIENCE GRADE: 10
FORCES AND NEWTON’S LAWS OF MOTION
Physical science
PHYSICAL SCIENCE
4.1 The Concepts of Force and Mass

A force is a push or a pull.
Contact forces arise from physical
contact .
Action-at-a-...
4.1 The Concepts of Force and Mass

Arrows are used to represent forces. The length of the arrow
is proportional to the ma...
4.1 The Concepts of Force and Mass

Mass is a measure of the amount
of “stuff” contained in an object.
4.2 Newton’s First Law of Motion

Newton’s First Law
An object continues in a state of rest
or in a state of motion at a c...
4.2 Newton’s First Law of Motion

The net force on an object is the vector sum of
all forces acting on that object.
The SI...
4.2 Newton’s First Law of Motion

Individual Forces

Net Force

5N

64

3N

4N
4.2 Newton’s First Law of Motion

Inertia is the natural tendency of an
object to remain at rest in motion at
a constant s...
4.2 Newton’s First Law of Motion

An inertial reference frame is one in
which Newton’s law of inertia is valid.
All accele...
4.3 Newton’s Second Law of Motion

Mathematically, the net force is
written as

F

∑

where the Greek letter sigma
denote...
4.3 Newton’s Second Law of Motion

Newton’s Second Law
When a net external force acts on an object
of mass m, the accelera...
4.3 Newton’s Second Law of Motion

SI Unit for Force
 m  kg ⋅ m
( kg )  2  = 2
s
s 
This combination of units is cal...
4.3 Newton’s Second Law of Motion
4.3 Newton’s Second Law of Motion

A free-body-diagram is a diagram that
represents the object and the forces that
act on ...
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Physical Science for Grade:10

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Transcript of "Physical Science for Grade:10"

  1. 1. 201201797 TN MBHAMALI PHYSICAL SCIENCE GRADE: 10 FORCES AND NEWTON’S LAWS OF MOTION
  2. 2. Physical science PHYSICAL SCIENCE
  3. 3. 4.1 The Concepts of Force and Mass A force is a push or a pull. Contact forces arise from physical contact . Action-at-a-distance forces do not require contact and include gravity and electrical forces.
  4. 4. 4.1 The Concepts of Force and Mass Arrows are used to represent forces. The length of the arrow is proportional to the magnitude of the force. 15 N 5N
  5. 5. 4.1 The Concepts of Force and Mass Mass is a measure of the amount of “stuff” contained in an object.
  6. 6. 4.2 Newton’s First Law of Motion Newton’s First Law An object continues in a state of rest or in a state of motion at a constant speed along a straight line, unless compelled to change that state by a net force. The net force is the vector sum of all of the forces acting on an object.
  7. 7. 4.2 Newton’s First Law of Motion The net force on an object is the vector sum of all forces acting on that object. The SI unit of force is the Newton (N). Individual Forces 4N 10 N Net Force 6N
  8. 8. 4.2 Newton’s First Law of Motion Individual Forces Net Force 5N 64 3N 4N
  9. 9. 4.2 Newton’s First Law of Motion Inertia is the natural tendency of an object to remain at rest in motion at a constant speed along a straight line. The mass of an object is a quantitative measure of inertia. SI Unit of Mass: kilogram (kg)
  10. 10. 4.2 Newton’s First Law of Motion An inertial reference frame is one in which Newton’s law of inertia is valid. All accelerating reference frames are noninertial.
  11. 11. 4.3 Newton’s Second Law of Motion Mathematically, the net force is written as  F ∑ where the Greek letter sigma denotes the vector sum.
  12. 12. 4.3 Newton’s Second Law of Motion Newton’s Second Law When a net external force acts on an object of mass m, the acceleration that results is directly proportional to the net force and has a magnitude that is inversely proportional to the mass.∑ The direction of the acceleration is the same as the direction of the net force.   F = ma  a= ∑  F m
  13. 13. 4.3 Newton’s Second Law of Motion SI Unit for Force  m  kg ⋅ m ( kg )  2  = 2 s s  This combination of units is called a newton (N).
  14. 14. 4.3 Newton’s Second Law of Motion
  15. 15. 4.3 Newton’s Second Law of Motion A free-body-diagram is a diagram that represents the object and the forces that act on it.
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