Chapter 2: Force & Newton`s Laws

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Transcript Chapter 2: Force & Newton`s Laws

Chapter 2: Force & Newton’s Laws
What is a balanced force?
Forces that are equal in size but
opposite direction.
What would happen to a ball that was thrown
horizontally if there was NO gravity?
The ball would continue to travel
How does air resistance change as
you move faster?
Air resistance increases.
What is static friction?
Static friction is the force that you have
to overcome in order to move an object.
What force always acts in an opposing direction
of a moving object?
What causes a feather to fall more
slowly than a brick?
Air resistance
What is inertia?
The tendency of an object to resist any
change in motion.
What is a force?
A force is a push or pull that one object
exerts on another.
What direction does friction travel in
relationship to a moving object?
Friction travels in an opposite direction of
a moving object.
What causes a ball to experience
vertical acceleration?
What happens to the acceleration of
an object if you double the net force?
The acceleration doubles.
Short Answer
Give an example of rolling friction and
sliding friction. Which would allow you to
move an object more easily?
Short Answer
Give an example of you moving an
object and have to overcome static
friction and then how sliding friction
comes into effect.
Newton’s Three Laws
Describe each law.
 Where do we see each law?
 What forces are present in each law?
Go over each of our labs and make a
connection from that lab to the concept
we were learning in class.
What is the force?
m = 15 kg
a = 3 m/s2
Answer: 45 N
What is the mass?
F = 2000 N
a = 40 m/s2
Answer: 50 kg
What is the acceleration?
F = 150 N
m = 25 kg
Answer: 6 m/s2