1. Newton’s Second Law of Motion
Chapter 3
Section 1

2. Force, Mass, & Acceleration
How does force cause motion to change?
What is the difference between throwing a baseball and tossing one gently?
In both examples they start at rest.
One has a faster velocity than the other.
Which one has a greater acceleration, the baseball thrown or the baseball gently tossed?

3. Force, Mass, & Acceleration
The greater the force applied to an object, the greater the acceleration will be.
AKA – the harder the baseball is thrown the faster it will accelerate.

4. Force & Mass
If you throw a cotton ball and a baseball as hard as you can, why don’t they have the same speed?
Because of their different masses.
The acceleration of an object depends on its mass as well as the force applied to it.
Force, mass, and acceleration are all connected.
Newton’s Second Law of motion describes this relationship!

5. Newton’s Second Law of Motion
Remember – net force is when more than one force is applied to an object.
Newton’s Second Law of Motion states:
The net force acting on an object causes the object to accelerate in the direction of the net force.

6. Newton’s Second Law of Motion
Another words…
How much an object accelerates depends on the mass of the object and how much force is applied to it.
The equation for this is:
Force = mass x acceleration
F=ma

7. Newton’s Second Law of Motion
Force is measured in Newtons
Force = mass x acceleration
1 Newton = kg x m/s2

8. Newton’s Second Law of Motion
a = 150 m/s2
m = .50 kg
F = ?
F = ma
F = (.50 kg)(150 m/s2)
F = 75 kg m = 75 N s2
If a baseball is thrown at 150 m/s2 and it’s mass is .50 kg what force is necessary to change its direction?