Homework 9

# Homework 9 - lim(kl9356 – Homework 9 – Weathers...

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Unformatted text preview: lim (kl9356) – Homework 9 – Weathers – (17104) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A time-varying net force acting on a 2 . 5 kg particle causes the object to have a displace- ment given by x = a + b t + d t 2 + e t 3 , where a = 2 . 2 m , b = 3 . 1 m / s , d =- 4 . 4 m / s 2 , and e = 2 m / s 3 , with x in meters and t in seconds. Find the work done on the particle in the first 2 . 5 s of motion. Answer in units of J. 002 (part 1 of 3) 10.0 points A 1850 kg car accelerates uniformly from rest to a speed of 11 . 4 m / s in 3 . 25 s. Find the work done by the net force on the car during this time interval Answer in units of J. 003 (part 2 of 3) 10.0 points Find the average power delivered by the net force to the car in this time interval. Answer in units of w....
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## This note was uploaded on 09/07/2010 for the course PHYS 1710 taught by Professor Weathers during the Fall '08 term at North Texas.

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Homework 9 - lim(kl9356 – Homework 9 – Weathers...

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