1. Newton’s second law of motion

4. Small mass - B IG ACCELERATION

5. BIG MASS - Small acceleration

7. A 52-kg water skier is being pulled by a speedboat. The force causes her to accelerate at 2 m/s 2. Calculate the net force that causes this acceleration. F = MA

8. A 52-kg water skier is being pulled by a speedboat. The force causes her to accelerate at 2 m/s 2. Calculate the net force that causes this acceleration. F = MA F = 52 kg X 2 m/s 2

9. A 52-kg water skier is being pulled by a speedboat. The force causes her to accelerate at 2 m/s 2. Calculate the net force that causes this acceleration. F = MA F = 52 kg X 2 m/s 2 F = 104 kg · m/s 2

10. A 52-kg water skier is being pulled by a speedboat. The force causes her to accelerate at 2 m/s 2. Calculate the net force that causes this acceleration. F = MA F = 52 kg X 2 m/s 2 F = 104 kg · m/s 2 or F = 104 N

11. What is the net force on a 1,000 kg elevator accelerating at 2 m/s 2. F = MA

12. What is the net force on a 1,000 kg elevator accelerating at 2 m/s 2. F = MA F = 1000 kg X 2 m/s 2

13. What is the net force on a 1,000 kg elevator accelerating at 2 m/s 2. F = MA F = 1000 kg X 2 m/s 2 F = 2000 kg · m/s 2

14. What is the net force on a 1,000 kg elevator accelerating at 2 m/s 2. F = MA F = 1000 kg X 2 m/s 2 F = 2000 kg · m/s 2 or F = 2000 N

15. What is the net force needed to accelerate a 55-kg cart at 15 m/s 2. F = MA

16. What is the net force needed to accelerate a 55-kg cart at 15 m/s 2. F = MA F = 55 kg X 15 m/s 2

17. What is the net force needed to accelerate a 55-kg cart at 15 m/s 2. F = MA F = 55 kg X 15 m/s 2 F = 825 kg · m/s 2

18. What is the net force needed to accelerate a 55-kg cart at 15 m/s 2. F = MA F = 55 kg X 15 m/s 2 F = 825 kg · m/s 2 or F = 825 N