force newton’s laws 1 first law - inertia second law – force and acceleration third law –...
TRANSCRIPT
ForceNewton’s Laws
1
First Law - Inertia
Second Law – Force and Acceleration
Third Law – Action and Reaction
Introduction
ForceNewton’s Laws
2
Newton’s three laws of motion are…
Law #1
Law #2
Law #3
A body at rest will stay at rest unless acted upon by an external agent and a body in motion will remain
with the same motion, in a straight line, unless acted upon by an external agent.
The force acting on a body is equal to the product of its mass times its acceleration,
Each action has an equal an opposite reaction.
amF
ForceNewton’s Laws
3
First Law of Motion
Law #1
A body at rest will stay at rest unless acted upon by an external agent and a body in motion will remain
with the same motion, in a straight line, unless acted upon by an external agent.
In other words, a change in a particle’s (body’s) speed or direction can only occur if there is an external force (agent) acting on it. This can also be seen for each component of the force.
ForceNewton’s Laws
4
There is something wrong with the way the ball bounces.
Do you know what it is?
Think about the forces that are present and their directions.
Think about Newton’s First Law.
Maybe the next animation will help.
ForceNewton’s Laws
5
Second Law of Motion
Law #2
The force acting on a body is equal to the product of its mass times its acceleration,
In other words, the sum of the forces acting on a particle is proportional to its acceleration. The mass is the constant of proportionality.
amF
ForceNewton’s Laws
6
Third Law of Motion
Law #3 Each action has an equal an opposite reaction.
In other words, for every force acting on a particle, there is an equal and opposite force that the particle puts on the object that gave it the original force.
ForceNewton’s Laws
7
Name some of the action/reaction pairs in this picture.
ForceNewton’s Laws
8
Name some of the action/reaction pairs in this picture.
ForceNewton’s Laws
9
Name some of the action/reaction pairs in this picture.
ForceNewton’s Laws
10
Name some of the action/reaction pairs in this picture.
ForceNewton’s Laws
11
Name some of the action/reaction pairs in this picture.
ForceNewton’s Laws
12
Name some of the action/reaction pairs in this picture.