Adragster with a mass of 700 kg attains a speed of 120 m/s in the quarter mile. immediately after passing the timing lights, the driver opens the drag chute, of area 7.5 m2. air and rolling resistance of the car may be neglected. find the time required for the machine to reduce its velocity to 20 m/s in standard air.
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Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h
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Adragster with a mass of 700 kg attains a speed of 120 m/s in the quarter mile. immediately after pa...
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