2. Welcome to Work/Energy/Power JEOPARDY KEYBOARDING

3. Final Jeopardy Question Horizontal Problems Components 100 Relative Velocity 500 400 300 200 100 200 300 400 500 Projectiles Launch at An Angle

4. Which of the following plays a determining factor in the time of travel for a projectile? a.Horizontal speed b.Horizontal displacement c.Vertical displacement d.Acceleration due to gravity Back Horizontal Problems 100 pts

5. C and D Back Horizontal Problems 100 pts Answer

6. Which of the following remains unchanged as an object travels along a trajectory? a.Vy, b. Vx, c. Y position, d. X position, e. a x f. a y Back Horizontal Problems 200 pts

7. Back Horizontal Problems 200 pts V x, a x, a y

8. Back Predict the path of an object dropped from an airplane would take. A. B. C. D. E.

9. Back Horizontal Problems 300 pts A.

10. Back Horizontal Problems 400pts An object is thrown off a 20 m cliff with a Velocity of 2 m/s. How much time was the Object in the air?

11. Back Horizontal Problems 400 pts Answer 2s

12. Back Horizontal Problems 500 pts An object is thrown off a 10 m cliff with a Velocity of 2 m/s. How for does it move in the horizontal direction?

13. Back Horizontal Problems 500pts Answer 4m

14. A runner moves 3 km E and then 4 km N. What is the runners displacement? Back Components 100pts

15. 5km at 53 degrees. Back Components 100 pts

16. Back Components 200 pts A person is shot out of a cannon with an initial Velocity of 3m/s at an angle 20 degrees. Determine the components a.Vx b.Vy

17. Back Components 200pts Answer Vx = 2.8 Vy = 1.02

18. A airplane flies with a speed of 40 m/s 20 NE. What is the Northern component? Back Components 300pts

19. Back Components 300 pts 13.7m/s

20. Back What are the acceleration components for a projectile? Components 400 pts

21. Ax = 0 m/s/s Ay = 9.8 m/s/s Back Components 400 pts Answer

22. Back Components 500 pts What are the velocity components at the Top of a trajectory for an object launched At an angle of 20 degrees with an initial Velocity of 35m/s?

23. Back Componetns 500 pts Answer Vx = 16.4m/s Vy = 0

24. Describe what happens to the velocity components of an object launched at an angle as it travels along its trajectory. Back Projectiles At an angle 100 pts

25. The horizontal component remains Unchanged, and the vertical Component changes at a rate of 9.8 m/s every second towards the earth Back Projectiles 100 pts Answer

26. Back Determine the total time a projectile is in the Air if it was shot at a 45 degree angle with an initial velocity of 22 m/s landing at the same Height it started? Projectiles 200pts

27. Back Use y-yi = 0 =vyi*t + 1/2gt^2 t= 2Vyi/g =3.4 s Projectiles 200pts Answer

28. Back Projectiles 300pts Determine the range of a project if it was shot at a 45 degree angle with an initial velocity of 22 m/s landing at the same Height it started?

29. Back Projectile 300pts Answer X-Xi = Vx t X = (22 cos 45)(3.4s) X =620 m

30. Back Projectiles 300 Determine the max height of a projectile if it was shot at a 45 degree angle with an initial velocity of 22 m/s?

31. Projectile 400pts Y-0 = -Vyi 2 /2g or Y-0 = Vyi*t 1/2 – ½ g t 1/2 2 Y = -(22Sin45) 2 /2g =12.34 m Back

32. Projectile 500 pts Determine the total time and range of a projectile shot from a 20 m high cliff at a 45 degree angle with an initial velocity of 22 m/s landing on the ground below?

33. Time = X-Xi = Back

34. A man walks east at 5m/s on a moving walkway that is moving 3m/s east. What is the mans velocity relative to a stationary observer? Back Relative Velocity 100 pts

35. 8m/s? Back

36. A man walks at a speed of +4 m/s relative A man who is walking towards him moving At -1 m/s relative to a stationary observer. What is the firsts mans speed relative to the Stationary observer? Back

37. Relative Velocity 200 pts +3m/s

38. A boat in still water takes 40 s to cross a 30m wide river. If the current in this river is moving downstream at 1m/s what is the boats velocity relative to a person standing on the shore? Back

39. 1.25 m/s at 53 SE

40. Back Two men moving at 6m/s step on to a moving walkway on opposite ends. The velocity is 4m/s east and is 10m long. What is the relative speeds of the men with respect to a stationary observer?

41. 10 m/s east 2 m/s west Back

42. Two men moving at 6m/s step on to a moving walkway on opposite ends. The velocity is 4m/s east and is 10m long. How much time does it take for the men to meet?

43. Back 8.3m.