1. 1. Supposea plane starts from rest when the time is zero. The planeaccelerate

Question

1.      1. Supposea plane starts from rest when the time is zero. The planeaccelerates down the runway and at 29s (seconds) attains a velocityof +260 km/h, where the plus sign indicates the velocity points tothe right .determine the average acceleration of the plane.

2.      2. A dragracer crosses the finish line, and the driver deploys a parachuteand applies the brakes to slow down. The driver begins slowing downwhen timed 9.0 s (seconds) and the car’s velocity is +28 m/s. When time is 12.0 s (seconds), the velocity has been reduced to+13 m/s . What is the average acceleration of the dragster?

3.     3. A man runs ina straight line at an initial velocity of 4.5 m/s. He acceleratesat 1.2 m / s2 with 13 seconds. How far does the mango?

4.      4. What isthe cars final velocity if it is accelerating at 45.0m/s2 with an initial velocity of 35.0 m/s through adistance of 80.0 m?

5.     5. Due tocontinental drift, the North American and European continents aredrifting apart at an average speed of 3.0 cm per year. At thisspeed, how long in years will it take for them to drift apart byanother 1500m?

6.     6. For astandard production car, the highest road tested acceleration everreported occurred in 1993, when Ford RS200 evolution went from zeroto 26.8 m/s in 3.275s. Find the magnitude of the carsacceleration.

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Explanation / Answer

Final speed (v) of the plane = 260km/h          = (260)(5 / 18)m/s          = 72.22 m/s Time (t) taken to accelerate = 29s Then the average acceleration (a) of the plane is    a= (v - vo)/t       = (72.22m/s - 0) / (29s)       = 2.49m/s2

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