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Unformatted text preview: homework 02 – FONTENOT, BRIAN – Due: Jan 28 2008, 4:00 am 1 Question 1, chap 2, sect 5. part 1 of 3 10 points In deep space (no gravity), the bolt (arrow) of a crossbow accelerates at 129 m / s 2 and attains a speed of 125 m / s when it leaves the bow. For how long is it accelerated? Answer in units of s. Question 2, chap 2, sect 5. part 2 of 3 10 points What speed will the bolt have attained 4 . 5 s after leaving the crossbow? Answer in units of m / s. Question 3, chap 2, sect 5. part 3 of 3 10 points How far will the bolt have traveled during the 4 . 5 s? Answer in units of m. Question 4, chap 2, sect 5. part 1 of 2 10 points A speed boat moving at 30 . 2 m / s ap proaches a nowake buoy marker 75 . 4 m ahead. The pilot slows the boat with a con stant acceleration of 4 . 2 m / s 2 by reducing the throttle. How long does it take the boat to reach the buoy? Answer in units of s. Question 5, chap 2, sect 5. part 2 of 2 10 points What is the velocity of the boat when it reaches the buoy? Answer in units of m / s. Question 6, chap 2, sect 6. part 1 of 1 10 points A ball is thrown straight up from the ground with an initial velocity of 37 . 2 m / s; at the same instant, a ball is dropped from the roof of a building 20 . 8 m high. After how long will the balls be at the same height? Answer in units of s. Question 7, chap 2, sect 5. part 1 of 1 10 points A baby sitter pushing a stroller starts from rest and accelerates uniformly at a rate of 0.705 m/s 2 ....
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This note was uploaded on 03/22/2008 for the course PHY 303K taught by Professor Turner during the Spring '08 term at University of Texas.
 Spring '08
 Turner
 Physics, Gravity, Work

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