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# CW4 - What is the size oF the average Force on the dragster...

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boland (kbb544) – CW4 – Mackie – (10611) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 3) 10.0 points A dragster and driver together have mass 890 . 2 kg . The dragster, starting from rest, attains a speed of 25 . 7 m / s in 0 . 62 s . Find the average acceleration of the drag- ster during this time interval. Correct answer: 41 . 4516 m / s 2 . Explanation: The average acceleration during time t is a = Δ v t = v - 0 t = v t = 25 . 7 m / s 0 . 62 s = 41 . 4516 m / s 2 . 002 (part 2 of 3) 10.0 points
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Unformatted text preview: What is the size oF the average Force on the dragster during this time interval? Correct answer: 36900 . 2 N. Explanation: The average Force on the dragster is f d = m d a = (890 . 2 kg) (41 . 4516 m / s 2 ) = 36900 . 2 N . 003 (part 3 oF 3) 10.0 points Assume the driver has a mass oF 72 . 6 kg . What horizontal Force does the seat exert on the driver? Correct answer: 3009 . 39 N. Explanation: The Force on the driver is F = m a = (72 . 6 kg) (41 . 4516 m / s 2 ) = 3009 . 39 N ....
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