1. Warm Ups

2. Mini Quiz: In PEN w/ no cross outs! 1)At what position is the vertical velocity zero? 2)What is the direction of the acceleration of the rock at point B? a)Upward b)Downward c)In the direction of point C d)In the direction of point A

3. Mini Quiz: In PEN w/ no cross outs! A stone is thrown horizontally from the top of a 25.00-m tall cliff. If the stone has a horizontal velocity of 15m/s, how far horizontally from the edge of the cliff will the stone land? 5) What is the first thing you need to calculate to solve this problem? a)Horizontal velocity b)Vertical velocity c)Drop time d)Height of the cliff 3) For an object that is accelerating, the velocity vs. time graph has what type of “shape” a)Sloped Line b)Curve c)Flat line d)I don’t know 4) For an object that is accelerating, the position vs time graph has what type of “shape” a)Sloped Line b)Curve c)Flat line d)I don’t know

4. Mini Quiz: In PEN w/ no cross outs! 6) Which of the following v vs. t graphs shows an object moving to rest? 7) Jordon runs at 30m/s. Alicia bikes at 60m/s. If they both travel for 5 seconds, then Alicia will travel: a)Twice as far b) The same distance c) Four times as far d) Half as far A v m/s (s) 0 v m/s (s) 0 v m/s (s) 0 v m/s (s) 0 BCD

5. Mini Quiz: In PEN w/ no cross outs! 8) Which interval is the object not moving? 9) Which interval is the object accelerating? 10) Which interval is the object moving backward? a)I -II b) II-III c) III-IV d) IV-V

6. Mini Quiz: In PEN w/ no cross outs! 11) Which correctly shows the resultant vector of the following two velocities: a)b)c)d) Zero 12) What is the x component of the following vector: a) 8.66b) 51.96N c) 5.0Nd) 29.54N 30° 60° 10N

7. Mini Quiz: In PEN w/ no cross outs! 13) What is the y component of the applied force? a) 17.2Nb) 21.7N c) 25Nd) 12.5N 14) What is the x component of the following vector: a) 5.0Nb) 9.6N c) 13.0Nd) 28.9N 30° 25N 15N

8. Mini Quiz: In PEN w/ no cross outs! **13 & 14 = A 15) What additional forces are necessary to bring the following object into a state of equilibrium? a) 20N North 20N east b) 20N South 20N east c) 20N North 20N east d) 20N South 20N west 16) In which case is the tension of the string the greatest?

9. Newton’s Laws Isaac Newton Born: 1643 Occupation: Physicist Famous for: Inventing Calculus Cam Newton Born: 1989 Occupation: NFL Quarterback Famous for: Inventing the Superman touchdown dance

10. *write on back* 1 st Law: Law of inertia ▫ An object at rest will stay at rest unless acted on by an outside force ▫ Inertia: The amount of mass an object has ▫ More inertia = more mass = Harder to move

11. 1 st Law: Law of inertia Who does Cam want for his offensive line? WHY?

12. 1 st Law: Law of inertia Whiteboards

13. 1 st Law: Law of inertia

14. 1 st Law: Law of inertia

15. 1 st Law: Law of inertia

16. 1 st Law: Law of inertia As shown in the diagram below, an open box and its contents have a combined mass of 5.0 kilograms. A horizontal force of 15N is required to push the box at a constant speed of 1.5 meters per second across a level surface. The inertia of the box and it contents increases if there is an increase in the: a) Speed of the box b) Mass of the contents of the box c) Magnitude of the horizontal force applied to the box d) Coefficient of kinetic friction between the box and the level surface

17. PUNDAY!

18. 3 rd Law: Equal and Opposite ▫ For every action, there is an equal and opposite reaction. ▫ “Things push back”

19. 3 rd Law: Equal and Opposite The SF player hits the N.O. player with a force of 50N. Which player will get a concussion? WHY?

20. 3 rd Law: Equal and Opposite

21. 3 rd Law: Equal and Opposite

22. 3 rd Law: Equal and Opposite

23. 3 rd Law: Equal and Opposite 50N east

24. 2 nd Law: Unbalanced NET Force = Acceleration F = ma ▫ Net Force causes acceleration (change in velocity) ▫ UNITS:  F - Newtons (N)  m - kilograms (kg)  a - meters per second squared (m/s 2 )

25. 2 nd Law: Unbalanced Force = Acceleration F = ma How does Cam throw a football so fast? What is the acceleration of the ball in the air?

26. 2 nd Law: Unbalanced Force = Acceleration F = ma A 40N force is applied eastward to a 10kg object. What is the acceleration and direction of the objects acceleration? 4m/s 2 east

27. 2 nd Law: Unbalanced Force = Acceleration F = ma 7500N

28. 2 nd Law: Unbalanced Force = Acceleration F = ma

29. 2 nd Law: Unbalanced Force = Acceleration

30. 2 nd Law: Unbalanced Force = Acceleration

31. 2 nd Law: Unbalanced Force = Acceleration

32. 2 nd Law: Unbalanced Force = Acceleration

33. 2 nd Law: Unbalanced Force = Acceleration F = ma Which graph(s) show the motion of an object with a unbalanced force of 15N?

34. 2 nd Law: Unbalanced Force = Acceleration F = ma Which graph(s) shows an object in equilibrium?

36. 2 nd Law: Unbalanced Force = Acceleration F = ma Time to combine the last 2 units into just 1 problem…..aaahhhh!

37. 2 nd Law: Unbalanced Force = Acceleration F = ma During a head-on collision, a passenger in the front seat of a car accelerates from 13.3 m/s to rest in 0.10 s. If the passenger has a mass of 60kg, what force does the seatbelt exert to stop her?

38. 2 nd Law: Unbalanced Force = Acceleration F = ma A parachutist slows down from 30m/s to 5m/s in a distance of 10m. To do this a net force of 300 N acts on him. What is his mass?