Newton's second law of motion states that the acceleration of an object depends on the mass of the object and the net force acting upon it. An unbalanced net force is required to change the velocity of an object, with greater net forces producing greater accelerations. The relationship between force, mass, and acceleration is expressed by the equation Force = Mass x Acceleration.

1. Newton’s Second Law of
Motion
Newton’s second law describes the motion of an object when an unbalanced force
acts on the object.

2. Force
• Force- Push or a pull on
an object
– Object speeds up, slows
down, or turns from force
• More than one force can act
on an object at the same time
• Net Force- Combination
of all the forces acting on
an object.
• Force= Mass X Acceleration

3. Balanced and Unbalanced Forces
• Balanced Forces- Two or
more forces exerted on
an object that cancel
each other and do not
change object’s velocity
– Net force is zero
• Unbalanced Forces-
Effects of the forces don’t
cancel and the object’s
velocity changes
– Net force is not zero

4. Newton’s Second Law of Motion
• Isaac Newton (1642-1727)-
Explained motion of objects in 3
laws of motion
• Newton’s Second Law of Motion-
The acceleration of an object
depends on the mass of the
object and the amount of force
applied.

5. Newton’s Second Law of Motion
• The second law of motion states that acceleration is produced when
an unbalanced force acts on an object (mass). The more mass the
object has the more net force has to be used to move it.
• In other 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

6. Examples of Newton’s Second Law
• If you use the same force to push a truck and push a car, the
car will have more acceleration than the truck, because the car
has less mass.
• It is easier to push an empty shopping cart than a full one,
because the full shopping cart has more mass than the empty
one. This means that more force is required to push the full
shopping cart.

7. Examples of Newton’s Second Law
• If you use the same force to push a truck and push a car, the
car will have more acceleration than the truck, because the car
has less mass.
• It is easier to push an empty shopping cart than a full one,
because the full shopping cart has more mass than the empty
one. This means that more force is required to push the full
shopping cart.