A drag racer must accelerate from rest to a speed of 80 m/s. If the car accelerates uniformly at 4.0 m/s², what is the minimum track length required to reach this speed?
- 750 m
- 800 m
- 850 m
- 900 m
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A drag racer must accelerate from rest to a speed of 80 m/s. If the car accelerates uniformly at 4.0 m/s², what is the minimum track length required to reach this speed?
A stone is tossed vertically upward from the edge of a canyon. It rises 9 meters above the rim before falling down to the canyon floor, which is 27 meters below the rim.
What is the total distance travelled by the stone?
→ The distance the stone travels from the edge of the canyon up into the air and back down to the edge of the canyon is 9 m + 9 m = 18 m.
→ The distance travelled by the stone from the edge of the canyon to the bottom of the canyon is 27 m.
→ The total distance travelled by the stone is 18 m + 27 m = 45 m.
A bus departs from its depot, starting from rest and accelerating uniformly at 2.0 ms
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Using the velocity-time graph below
Part 1
Determine the magnitude of the displacement:
Part 2
Determine the average acceleration between 4 and 8 seconds:
Part 1:
Part 2:
Part 1
→ The displacement for the motion can be calculated by find the area under the velocity time graph.
→ By splitting the graph up into the square and triangle, the area under the curve is:
Part 2
→ Average acceleration between t=4 and t=8 is: