Newton's Second Law of Motion
Newtons 2
nd
Law
Newton's second law of motion can
be formally stated as follows:
The acceleration of an object as
produced by a net force is directly
proportional to the magnitude of the
net force, in the same direction as the
net force, and inversely proportional
to the mass of the object.
The second law states that the
acceleration
of an object is
dependent upon two variables:
Net Force
M
ass
If
net
force
acting on an object
the
acceleration
of the object
If the
mass
of an object
the
acceleration
of the object
Instead…
F and A:
Direct relationship
M and A:
Inverse relationship
Newton’s 2
nd
Law Summarized:
The acceleration of an object is
directly related
to the net force
applied and
inversely related
to
the mass of the object.
F = M x A
Newtons 2
nd
law can be expressed using this formula…
Force = Mass x Acceleration
or
F= M
x
A
OR... We can use this:
Rank the following in order of the
acceleration
of the car
from greatest to least. Ties are possible!
F
A?
2F
F
A?
A?
A?
2F
a.
b.
c.
d.
1.
b
2.
a = d
3.
c
Rank the following in order of
force
required to accelerate
the car from greatest to least. Ties are possible:
F?
A
F?
F?
A
2 A
2 A
F?
a.
b.
c.
d.
1.
d
2.
b=c
3.
a
UNITS!!
A =
F
M
M =
F
A
These formulas only work if the
units
are correct:
•
Mass
in KILOGRAMS (kg)
•
Force
in NEWTONS (N)
•
Acceleration
in METERS/SECOND/SECOND
(m/s/s or m/s
2
)
F = M x A
Let’s try a few problems…
1. What
net force
is required to accelerate a car at a rate of
2 m/s
2
if the car has a mass of
3,000 kg
?
F=_______
m=______
a= _____
2. What
net force
is required to accelerate a bowing ball at the
same rate of rate of
2 m/s
2
if the bowling ball has a mass of
10 kg
?
F=______
m=______
a=______
3. What is the
acceleration
of a softball if it has a mass of
0.5
kg
and the player throws it with a force of
200 N
?
F=______
m=______
a=______
4. What is the
acceleration
of the
10 kg
bowling ball thrown by
the same player, throwing with a force of
200N
?
F=______
m=______
a=______
Nooooo…..
Newton's second law of motion explains how the acceleration of an object is related to the force applied and the object's mass. The law can be summarized in the formula F = M x A, where F is the net force, M is the mass of the object, and A is the acceleration. This law helps us understand the dynamics of objects in motion and how forces affect their movement.
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Presentation Transcript
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Instead The second law states that the acceleration of an object is dependent upon two variables: Net Force Mass If net force force acting on an object the acceleration acceleration of the object the acceleration acceleration of the object If the mass massof an object F and A: Direct relationship M and A: Inverse relationship
Newtons 2nd Law Summarized: The acceleration of an object is directly related to the net force applied and inversely related to the mass of the object. F = M x A
Newtons 2ndlaw can be expressed using this formula Force = Mass x Acceleration or F= M x A OR... We can use this: F a F M m = A =
Rank the following in order of the acceleration of the car from greatest to least. Ties are possible! 1. b 2. a = d 3. c M a. A? F M b. 2F A? 2M c. F A? 2M 2F d. A?
Rank the following in order of force required to accelerate the car from greatest to least. Ties are possible: M a. A F? 1. d 2. b=c 3. a 2M F? b. A M F? c. 2 A 2M d. F? 2 A
UNITS!! A = F F = M x A M = F A M These formulas only work if the units are correct: Mass in KILOGRAMS (kg) Force in NEWTONS (N) Acceleration in METERS/SECOND/SECOND (m/s/s or m/s2 )
Lets try a few problems 1. What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg? F=_______ m=______ a= _____ http://tomscollisionrepair.com/sitebuildercontent/sitebuilderpictures/webassets/lamborghini_cartoon_car_0.jpg 2. What net force is required to accelerate a bowing ball at the same rate of rate of 2 m/s2 if the bowling ball has a mass of 10 kg? F=______ m=______ a=______ http://www.esquire.com/cm/esquire/images/LP/bowling-ball-0408-lg.jpg
3. What is the acceleration of a softball if it has a mass of 0.5 kg and the player throws it with a force of 200 N? F=______ m=______ a=______ http://www.bluefield.edu/mediafiles/softball-ball-2.jpg 4. What is the acceleration of the 10 kg bowling ball thrown by the same player, throwing with a force of 200N? F=______ m=______ a=______ http://www.esquire.com/cm/esquire/images/LP/bowling-ball-0408-lg.jpg
