1. Newton’s 2nd Law
Sir Isaac Newton was an intellectual rock star, as well as a stylish dresser ( )
Demo: What does the acceleration of an object depend on?

2. 𝒂= 𝑭 𝒏𝒆𝒕 𝒎 Newton’s 2nd Law
Whenever a resultant force acts on an object, it produces an acceleration: an acceleration that is directly proportional to the force and inversely proportional to the mass.
𝒂= 𝑭 𝒏𝒆𝒕 𝒎

3. Newton’s 2nd Law
𝑎= 𝐹 𝑛𝑒𝑡 𝑚 = 100 𝑁 50 𝑘𝑔 =2 𝑁 𝑘𝑔 =2 𝑚 𝑠2

4. Newton’s 2nd Law
𝑎= 𝐹 𝑛𝑒𝑡 𝑚 = 200 𝑁 50 𝑘𝑔 =4 𝑁 𝑘𝑔 =4 𝑚 𝑠2

5. Newton’s 2nd Law
𝑎= 𝐹 𝑛𝑒𝑡 𝑚 = 200 𝑁 25 𝑘𝑔 =8 𝑁 𝑘𝑔 =8 𝑚 𝑠2

6. Newton’s 2nd Law
𝑎= 𝐹 𝑛𝑒𝑡 𝑚 = 0 𝑁 50 𝑘𝑔 =0 𝑁 𝑘𝑔 =0 𝑚 𝑠2

7. Force and AccelerationDF Da
= slope = mass F a DF Da
8 N
4 m/s2
= 2 N
m/s2
Inertia or mass of = 2 kg
Q: What is the physical significance of the slope of the graph of a vs. F?