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Rules : Everyone must attempt to answer each question.

Rules : Everyone must attempt to answer each question. Show your work on a separate sheet of paper. Keep track of your points. Winners receive prize. continue. Go BACK. You need to click on a number to proceed to the questions. Click here. continue. Really!!

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Rules : Everyone must attempt to answer each question.

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  1. Rules: • Everyone must attempt to answer each question. • Show your work on a separate sheet of paper. • Keep track of your points. • Winners receive prize. continue

  2. Go BACK. You need to click on a number to proceed to the questions. Click here continue

  3. Really!! Go BACK. You need to click on a number to proceed to the questions. Click here continue

  4. Displacement = 27.4m + 3m -3m Distance = 27.4m + 3m +3m continue

  5. 2) This object in freefall accelerates at 9.8 m/s/s. Every second the velocity changes by 9.8 m/s continue

  6. A ball rolls down an incline from rest. How far does it travel in 3 seconds if it accelerates at 5 m/s2? Show Work for Credit d = vit + ½ at2 d = 0 + ½ (5 m/s2) (3s)2 d = 22.5 m continue

  7. 4) Vavg = (Vf + Vi)/2 Vavg= (10m/s +25m/s)/2 Vavg = 17.5 m/s continue

  8. 1) d = vit + ½ at2 -6m = ½ a (2.7s)2 a = 1.6 m/s/s down continue

  9. The acceleration of a projectile is always 9.81 m/s2downward because the only force acting on the object is gravity. continue

  10. 2)d = vit + ½ at2 -22m = ½ a (3.0s)2 a = 4.9 m/s/s down continue

  11. VERTICAL d = vit + ½ at2 -45m = 0 + ½ (-9.81m/s2) t2 t = 3.0 s HORIZONTAL d = vit + ½ at2 d = (25 m/s)(3.0 s) + 0 d = 75 m continue Show Work for Credit

  12. 2) v vs. t graphs are always linear. Slope = accel. = -9.81 m/s2 continue

  13. vf = vi + at 0 = 98 m/s + (-9.81m/s2)t t = 10. s continue

  14. 3) g = Fg/m continue

  15. Fnet = ma 12 N = (2kg+1kg)a a = 4 m/s2 continue

  16. A B C D E Which graph(s) depict an object that is accelerating? DAILY DOUBLE Select an amount of points you want to wager before going on to the question. You can only wager up to as many points as you currently have B and C only continue

  17. 2) An object in equilibrium has an acceleration equal to zero. continue

  18. Newton’s 3rd Law: the forces are equal in magnitude, opposite in direction. Fnail on hammer = - Fhammer on nail continue

  19. Fnet = ma 50N – Ff = (4 kg)(10 m/s2) Ff= 10N continue

  20. Fnet = ma Fapplied – Ffriction = 0 Fapplied= Ffriction Fapplied= μFN = (0.05)(80kg x 9.81m/s2) Fapplied= 40N continue

  21. (C) If the net force is zero, the acceleration must also be zero. The slope of the speed graph = accel. = 0. Constant speed = constant slope of distance graph. continue

  22. Show Work for Credit Fnet = ma Fapplied – Ffriction = 0 Fapplied = Ffriction Fapplied= μFN = (0.67)(60 N) Fapplied= 40N continue

  23. Fnet = ma = 0 F – Ffriction– Fparallel = 0 F = Ffriction+ Fparallel F = Ffriction + Fg sinθ F = 3N + (10N)sin30° F= 3N + 5N F= 8N continue

  24. B (4) Add vectors head to tail continue

  25. List 3 scalar quantities and 3 vector quantities. Include units. DAILY DOUBLE Select an amount of points you want to wager before going on to the question. You can only wager up to as many points as you currently have Scalar: distance (m), speed (m/s), mass (kg), time (s),temp (°C) Vector: displacement (m), velocity (m/s), acceleration (m/s2), Force (N), impulse (N·s), momentum (kg·m/s) continue

  26. (4) FH = Fcosθ FH =(24N)cos35° FH = 20. N FV= Fsinθ FV=(24N)sin35° FV= 14. N continue

  27. A B R (1) continue

  28. (4) Arrange 30N vectors to be head-to-tail, resultant starts at the tail of the first and ends at the head of the last. 30N 30N R continue

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