1. Newton’s Second Law of Motion The net force on an object is equal to the product of its acceleration and its mass. Force = Mass X Acceleration

2. What the 2 nd Law means: The amount of force needed to move an object depends on how much mass the object has. If you increase the mass on an object, its acceleration decreases. When the same force is applied, an object with less mass will accelerate faster. If you increase the force on an object, its acceleration also increases.

3. Force = Mass X Acceleration One Newton (N) equals the force required to accelerate one kilogram of mass at 1 meter per second per second. 1 Newton = 1kg x 1m/s²

4. FORCE = MASS X ACCELERATION Using what we know, lets say that on the way to work my truck breaks down. My truck weighs 1000 Kg. As I am pushing my truck I am able to make it roll at 0.05 m/s2. Since you know Newton's Second Law of Motion you can calculate how much force (aka NEWTONS) I am applying to my truck. FORCE = 1000 x.05 FORCE = 50 NEWTONS

5. Force = Mass X Acceleration How much force does a speed boat need to exert to accelerate a 52 kg water skier at a rate of 2 m/s²? Force = 52 kg X 2 m/s² Force = 104 N

6. Force = Mass X Acceleration 104 Newtons of force needs to be exerted by a speed boat to accelerate a 52 kg water skier 2 m/s². Force = 52 kg X 2 m/s² Force = 104 N If you increase the force exerted by the speed boat, the water skier accelerates twice as much. Acceleration = Force/Mass 4 m/s² = 208 N / 52 kg

7. Force = Mass X Acceleration How much force is needed to accelerate a 52 kg water skier at 4 m/s²? 208 N= 52 kg x 4 m/s² If you increase the mass of the water skier, its acceleration decreases. 2 m/s² = 208 N / 104 kg

8. Force, Mass, and Acceleration Think About It: How is the acceleration of a wagon related to the force pulling it? How is the acceleration of a wagon related to the mass of the wagon?