1. Motion & Forces 6. Newton’s 2nd Law of Motion

2. Newton’s 2nd Law is the law of motion, force, and acceleration
Force = Mass  Acceleration
F = MA

3. Newton’s 2nd Law pertains to forces that are unbalanced
Motion is occurring

4. The 2nd law states that acceleration is dependent on 2 variables
Force acting on an object (F)
Mass of the object (M)

5. and inversely on the mass of the object
The acceleration of an object depends directly on the force acting on the object
and inversely on the mass of the object
More M Less A
Less A More M

6. When one player checks another the force that the player gets hit with
is the product of the other players acceleration and mass

7. Force
Mass
Acceleration
(N)
(kg)
(m/s/s) 10 2 20 4 5

8. What net force is needed to accelerate a 55 kg cart at 15 m/s2?
Remember:
Force = Mass  Acceleration
Force = 55 kg  15 m/s2
Force = 825 Newtons

9. Force = Mass  Acceleration
A 52 kg water-skier is being pulled by a speedboat. The force causes her to accelerate 2 m/s2. What is the net force that causes the acceleration?
Force = Mass  Acceleration
Force = 52 kg  2 m/s2
Force = 104 Newtons