Physics Chapter 11 - Picture Problems
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Back - Answer |
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| 1. Using this distance - time graph, calculate the average SPEED. |
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1. S = ? D=60km T=4hr S = D/T S = 60 km / 4hr S = 15 km/hr |
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| 2. Using this distance - time graph, explain the relative speeds of A, B, & C. |
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2. a) Fast speed (steep line) b) No distance covered = 0 km/h (horizontal line) c) Moderate speed (medium slope to line) |
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| 3. Part #1: Calculate the speeds of segments A, B, & C. Part #2: What is the total average speed of the trip? |
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3. a) 12m / 6s = 2m/s b) 0 m / 8s = 0 m/s c) 4m / 4s = 1m/s Part #2: 16m / 18s = 0.89 m/s |
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4. a) What is the total distance covered? b) What is the total time spent? c) What is the average speed for the entire trip? |
4. a) 14km + 12km + 15km + 11km = 52km b) 12min + 8min + 9min +15min = 44min c) 52km / 44min = 1.18 km/min |
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| 5. Calculate the average speed of the trip. |
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5. S = ? D = 180cm T = 8h S = D / T S = 180 cm / 8h S = 22.5 cm/h |
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| 6. Using this data chart as your model of collected data, what is the missing number in the Distance column? |
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6. Each of the distances are 45 cm apart. The missing number should be 90 + 45 = 135. | |
| 7. What is the acceleration shown on a) Line segment A-B, b) Line segment B-C, and c) Line segment C-D? |
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7. (FV - OV) / T = A a) (30m/s-10m/s)/100s = 0.2 m/s/s b) (30m/s - 30m/s)/50s = 0 m/s/s (no acceleration) c) (5m/s-30m/s)/50s = - 0.5m/s/s (notice the negative sign) |
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| 8. If this is a graph showing a straight line for speed versus time, what does it say about acceleration? |
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8. Since the speed is increasing at a constant rate (straight line), then you do have acceleration. | |
| 9. a) Which line segments show positive acceleration? b) Which line segments show negative acceleration? |
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9. Lines A and B show positive acceleration. Line C shows that you are slowing down and thus acceleration would be a negative number. | |
| 10. A plane takes 3 hours to cover 750 km. What is the SPEED of the plane? |
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| 11. A bullet train covers 354 kilometers in 2 hours. What is its average SPEED? |
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11. S = ? D = 354 km T = 2 hr S = D / T S = 354 km / 2 hr S = 177 km/hr |
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| 12. The dragster takes 5 seconds to reach a velocity of 250 km/hr. What is its acceleration? |
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12. A=? FV=250km/hr OV=0km/hr T=5sec A = (FV-OV)/T A = (250 km/hr - 0 km/hr)/5s A = 50 km/hr/s |
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| 13. Your new sports car can reach 150 km/hr in 4.5 seconds. What is its acceleration? |
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13. A=? FV=150km/hr OV=0km/hr T=4.5s A = (FV-OV)/T A = (150km/hr - 0km/hr) / 4.5s A = 33.33 km/hr/s |
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| 14. The hydrofoil speedboat covers an 8 km course in 0.09 hours. What is its average speed? |
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14. S = ? D = 8km T = 0.09hr S = D / T S = 8km / 0.15hr S = 88.89 km/hr |
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15. At what SPEED is a plane traveling if it covers 1,786 kilometers in 1.5 hours? |
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15. S = ? D = 1786 km T = 1.5hr S = D / T S = 1786 km / 1.5 hr S = 1190.67 km/hr |
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| 16. The bicycle racer increased his velocity from 0.0 m/s to 9 m/s in 8s. What is his acceleration? |
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16. A=? FV=9m/s OV=0m/s T=8s A = (FV-OV)/T A = (9m/s - 0m/s)/8s A = 1.13 m/s/s |
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| 17. A millipede decreases its velocity from 0.23 m/min to 0.15 m/min in 2 minutes. What is its acceleration? |
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17. A=? FV=0.15m/min OV=0.23m/min T=2min A = (FV-OV) / T A = (0.15m/min - 0.23m/min) / 2min A = 0.04 m/min/min |
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18. Sara covers 46 meters on her skateboard in 4 minutes. What is her SPEED? |
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18. S = ? D = 46m T = 4 min S = D / T S = 46m / 4min S = 11.5 m/min |
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| 19. A fly travels 3 meters from the kitchen door to a donut on the countertop in 5 seconds. What is its SPEED? |
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19. S = ? D = 3m T = 5 s S = D / T S = 3m / 5s S = 0.6 m/s |
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| 20. Your new go-cart can cover 3km in 7 minutes. What is its top SPEED? |
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20. S = ? D = 3km T = 7 min S = D / T S = 3 km / 7 min S = 0.43 km/min .... or .... 25.71 km/hr (To get the km/hr you have to multiply the .43 km/min by 60) |
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