Two Labs and Two Focused Notes
Keshawn-Bubba
Classroom_Presentation_Toolkit_Newton_s_Laws_of_Motion_6_2.pptx
Newton’s Laws of Motion
Section 2
1
Essential Questions
What is inertia and how is it related to Newton’s first law of motion?
How can an object’s acceleration be calculated using Newton’s second law of motion?
According to Newton’s third law of motion, how are the forces between interacting objects related?
Review Vocabulary
acceleration: rate of change of velocity
New Vocabulary
Newton’s first law of motion
inertia
Newton’s second law of motion
Newton’s third law of motion
Isaac Newton and the Laws of Motion
In 1665, Cambridge University in Britain closed for 18 months because of the bubonic plague. Isaac Newton, a 23-year-old student, used this time to develop the law of universal gravitation, calculus, and three laws describing how forces affect the motion of objects. Newton’s laws of motion apply to the motion of everyday objects, such as cars and bicycles, as well as the motion of planets and stars.
Newton’s First Law of Motion
Newton’s first law of motion states that an object moves at a constant velocity unless an unbalanced force acts on it. This means that a moving object will continue to move in a straight line at a constant speed unless an unbalanced force acts on it. If an object is at rest, its velocity is zero and it stays at rest unless an unbalanced force acts on it.
Matt Meadows/ McGraw-Hill Education
You might have seen the law of inertia without even knowing it. For example, as the car hits the block and stops, the red block continues to move forward.
Newton’s Second Law of Motion
Newton’s first law of motion states that the motion of an object changes only if an unbalanced force acts on the object. Newton’s second law of motion describes how the forces exerted on an object, its mass, and its acceleration are related.
(l)Bob Scott/Superstock, (r)Donald Miralle/Getty Images
Newton’s Third Law of Motion
Newton’s third law of motion states that when one object exerts a force on a second object, the second object exerts a force on the first that is equal in strength and opposite in direction.
Frederic J. Brown/AFP/Getty Images
acceleration
D
net force
C
inertia
B
balanced force
A
Which term describes the tendency of an object to resist a change in motion?
Assessment
1.
CORRECT
Its momentum is constant.
D
It pulls on Earth, and Earth pulls on it.
C
It has no inertia.
B
Its acceleration depends on its mass.
A
Which of the following is true about an object in free fall?
Assessment
2.
CORRECT
gravity
D
static friction
C
air resistance
B
net force
A
An object always accelerates in the same direction as which of the following?
Assessment
3.
CORRECT
ipc_txen_inertia
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