3. Class objectives
Content Standard
The learners demonstrate an understanding of: Newton’s three laws
of motion and uniform circular motion.
Performance Standard
The learners shall be able to:
develop a written plan and implement a “Newton’s Olympics”.
Formation Standard
The learner is able to acquire knowledge and competence in classifying his or her
practical experiences to what laws of motion it applies. Such as the falling of apples
from a tree (Law of Inertia). Accelerating on riding a bicycle (Law of Mass and
Acceleration). Jumping on the bed (Law of Action and Reaction).
4. NEWTON'S FIRST LAW OF
MOTION (LAW OF INERTIA)
A body at rest persists in its state of rest, and a body in
motion remains in constant motion along a straight line unless
acted upon by an external force. Inertia is a property of a body
that tends to preserve that body's state of rest when it is at
rest or to maintain a body's motion when it is in motion.
5. Example
Pushing a crate. The crate will remain at rest if there is no force applied to it. When you try to
push it once, there will be an unbalanced force acted on it. But if you push it on a constant
rate or motion, it will have a constant speed and direction due to the force being applied.
6. NEWTON'S SECOND LAW OF MOTION
(LAW OF MASS AND ACCELERATION)
The second of Newton's three laws of motion is also known as
the law of mass and acceleration. Newton's Second Law of
Motion says that acceleration (gaining speed) happens when a
force acts on a mass (object).
8. NEWTON'S THIRD LAW OF MOTION
(LAW OF ACTION AND REACTION)
Newton's third law of motion posits that for every force applied, there is
always an equal and opposite reaction. Or, if one body exerts a force on
another, the second body exerts an equal and opposite force on the first.
It is not possible to exert a force on a body without a reaction, and the
reaction exerted by the body is exactly equal to the force being applied to
the body, neither more nor less.
9. Example
A ball is thrown against a wall. The ball puts a force on the wall (action force),
and the wall puts a force on the ball (reaction force) so the ball bounces off.
10. If you have any questions, please do email me.
Thank you!