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Marvelous Motion

Marvelous Motion. Need for Speed (and Velocity). Ample acceleration. Great Graphing. Grab Bag. Potpourri. 100. 100. 100. 100. 100. 100. 200. 200. 200. 200. 200. 200. 300. 300. 300. 300. 300. 300. 400. 400. 400. 400. 400. 400. 500. 500. 500. 500. 500. 500.

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Marvelous Motion

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  1. Marvelous Motion Need for Speed (and Velocity) Ample acceleration Great Graphing Grab Bag Potpourri 100 100 100 100 100 100 200 200 200 200 200 200 300 300 300 300 300 300 400 400 400 400 400 400 500 500 500 500 500 500 JEOPARDY!

  2. A runner jogs to the 60 m mark on a field and then turns and runs back to the 20 m mark. What is her displacement and her distance? Answer: Disp=20 m North, dist=100 m

  3. This is calculated when you take the total distance traveled and divide it by the total time. Answer: Average speed

  4. This describes an object’s speed and direction. Answer: Velocity

  5. Look at the graph below and calculate the speed between 20-40 s. Answer: 2 m/s

  6. Look at the following graph and describe the swimmer’s motion? Answer: swam 600 m in 20 sec, then stopped for 20 sec, then went 600 m in 10 sec

  7. Finding the slope of a distance vs time graph will give you this value? Answer: speed

  8. Kim was so happy that Carolina beat Georgia on Saturday that when she heard the final score she drove from 55mph to 80mph in 2.3 seconds down the road. What was Kim’s acceleration before the cop pulled her over? Answer:10.87 mi/hr/sec

  9. Describe how it is possible to have a constant speed, but a changing velocity and give an example? Answer: change in direction

  10. A car travels at a constant velocity of 50 m/s north for 120 sec. What is the car’s total distance traveled in km. Answer: 6 km

  11. Calculate the speed of each of the runners and describe who won and why? Answer: series two won, it reached 10 m first with an average speed of 2 m/s and the series 1 runner with 1.25 m/s

  12. This is the formula for calculating acceleration? Answer: a= (Vf-Vi)/t

  13. A bus comes to a stop at an acceleration of -2m/s2 from 12 m/s, how long did it take the bus to stop? Answer: 6 seconds

  14. A skier is going downhill at a speed of 9 m/s. The hill gets steeper and her speed increases to 18 m/s in 3 s What is her acceleration? Answer: 3 m/s2

  15. Describe the acceleration of an object that has a constant velocity. Answer: ZERO!

  16. This graph contains information about the motion of a bicycle. At which of the following times is the bicycle’s acceleration zero? Answer: 3-7seconds

  17. What does a negative acceleration graph look like? Answer:

  18. The graph below relates speed and time of four cars (1, 2, 3, and 4) traveling along a straight highway. Which two cars move with zero acceleration?

  19. Which graph represents an object traveling with a constant acceleration?

  20. A driver starts her car and steps on the gas pedal. The car gradually accelerates to 50 km/hr. A few minutes later, the driver suddenly slams on the brakes to avoid hitting a box in the road. As the car comes to a stop, the driver’s body appears to lurch forward in the seat until it is restrained by the seatbelt. Use the following graphs to answer the question. Which graph describes the cars motion? Answer: C

  21. A babysitter is pushing a stroller from rest and accelerates at a rate of 0.0500 m/s2, what is the velocity in m/s of the stroller after it has traveled for 4.75 minutes? Answer: 14.25 m/s

  22. What is the speed of a rocket that travels 8000 m in 12.12s? Answer: 660.07 m/s

  23. If the acceleration of a go cart is 5.45 m/s2 from 15 to 20 m/s, how long does it take to reach this speed? Answer: 0.92s

  24. During a race, a sprinter increases from 5 to 7 m/s over a period of 1.25 seconds, what is the sprinters acceleration? Answer:1.6 m/s2

  25. A Chevy truck has an acceleration of 7 m/s2, if it accelerates from rest to a final speed of 28 m/s, how long does it take the truck to reach this speed? Answer:4 seconds

  26. Lauren’s SUV was detected speeding when the speed limit was 60 km/hr, how many km/hr would she have been traveling over the limit if she had covered a distance of 10 km in 5 minutes? Answer: 60 mph

  27. At 10 seconds David was traveling at 70 m/s and then at 25 seconds he was traveling 130 m/s, how much did he accelerate? Answer: 4m/s2

  28. Contrast a flat line on a distance time graph versus on a velocity time graph. Answer: no movement versus constant speed therefore no acceleration

  29. Contrast speed, velocity, and acceleration giving one difference between each. Answer: speed does not have direction like velocity and acceleration

  30. What is the walking speed of a person in km/hr if they move 2000m/s? Answer: 7200 km/hr

  31. A student rides her bicycle from her home to the library. She stays there for a while and then goes to a friend’s house. Use the following graphs to answer the question. Which graph BEST matches this situation? Answer: A

  32. ? Answer:

  33. ? Answer:

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