Transcript Day 16 Newtons Second Lawx

Starter
• Dummies are used in simulated car
crashes to study what might
happen to passengers in a real
crash. They are fitted with a range
of measuring devices that track
the motion of the dummies
throughout the crash. By analyzing
the data, scientists learn how
injuries occur and how they can
be prevented.
• What forces act on the crash-test
dummy to slow its forward
movement?
Newton’s Second Law
Day
Essential Question
oWhat
is Newton’s Second law?
2nd Law Lab
2nd Law Notes
oHow
fast the motion of an object
changes depends on its mass and the
force applied. The greater the force, the
faster it will accelerate. The larger the
mass, the slower it will accelerate. This is
what Newton’s Second Law States.
2nd Law Notes
Examples
oWhen
you kick a beach ball, it flies
through the air in the direction of the
kick.
oIf
you drop something it falls down,
the larger the mass the bigger the
force on the ground when it hits.
Force
Force is a push or pull on an object.
Formula: F=m*a
Variables:
Units:
F- Force
N-Newton = (kg*m/s2)
m- mass
kg
a – acceleration
m/s²
Force
F = m*a
List the other two ways to write the formula
F
m
a
Practice Problems: KWFL chart Force
Directions: Answer the Force problems. You can do this with
another partner. Using a KWFL.
1.An
object with a mass of 100 kg accelerates at a rate of
2.4 m/s2. What force is exerted on the object?
2.A
rolling object accelerates at 4.3 m/s2. The force on the
object is 86 N. What is the mass of the object?
3.What
is the force exerted by a 10 kg toy car accelerating
at 3 m/s2?
4.What
is the acceleration of a 1000 kg truck with 4000 N
driving it?
Exit Slip
oList
three examples of Newton’s 2nd
law.
oAnswer
all lab questions thoroughly.