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Unformatted text preview: homework 08 GADHIA, TEJAS Due: Mar 21 2007, 4:00 am 1 Question 1 part 1 of 1 10 points A rocket is fired vertically upward. At the instant it reaches speed of 281 m / s, it explodes into three fragments with equal masses. Im mediately after the exposion, the first frag ment flies vertically with speed 627 m / s, while the second fragment flies horizontally with speed 332 m / s. What is the speed of the third fragment immediately after the exposion? Answer in units of m / s. Question 2 part 1 of 1 10 points A triangular wedge 7 m high, 12 m base length, and with a 13 kg mass is placed on a frictionless table. A small block with a 7 kg mass (and negligible size) is placed on top of the wedge as shown in the figure below. 13 kg 12 m 7m 7 k g X wedge 13 kg 12 m 7m 7 k g All surfaces are frictionless, so the block slides down the wedge while the wedge slides sidewise on the table. By the time the block slides all the way down to the bottom of the wedge, how far X wedge does the wedge slide to the right? Answer in units of m. Question 3 part 1 of 2 10 points A block of mass 41 kg slides along a fric tionless table with a speed of 36 m / s. Directly in front of it, and moving in the same direc tion with a speed of 20 m / s, is a block of mass 65 kg. A massless spring with spring constant 1922 N / m is attached to the second block as in the figure. 41 kg 36 m / s 1922 N / m 65 kg 20 m / s During the collision, the spring is com pressed by a maximum amount x . What is this maximum compression? Hint: work in an inertial frame in which p 1 + p 2 = 0 ....
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This note was uploaded on 04/05/2010 for the course BIO 52435 taught by Professor Clerck during the Spring '10 term at University of Texas at Austin.
 Spring '10
 Clerck

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