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Unformatted text preview: homework 06 GADHIA, TEJAS Due: Feb 28 2007, 4:00 am 1 Question 1 part 1 of 2 10 points While skiing in Jackson, Wyoming, your friend Ben (75 kg) started his descent down the bunny run, 11 m above the bottom of the run. If he started at rest and converted all of his gravitational potential energy into kinetic energy, what is Bens kinetic energy at the bottom of the bunny run? Answer in units of J. Question 2 part 2 of 2 10 points What is his final velocity? Answer in units of m / s. Question 3 part 1 of 3 10 points A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9 . 81 m / s 2 . =0 . 3 1 . 1 m b b b b b b b b b b b b 525 g h 1 . 9m 4 . 06 m 9 . 81m / s 2 v At what height h above the ground is the block released? Answer in units of m. Question 4 part 2 of 3 10 points What is the the speed of the block when it leaves the track? Answer in units of m / s. Question 5 part 3 of 3 10 points What is the total speed of the block when it hits the ground? Answer in units of m / s. Question 6 part 1 of 1 10 points Two atoms of equal mass interact with a potential energy U ( r ) = A r 8- B r 4 A > , B > At what separation is the force zero? 1. 4 radicalbigg B 2 A 2. 4 radicalbigg A B 3. 4 radicalbigg B A 4. 4 radicalbigg 2 A B Question 7 part 1 of 3 10 points Starting from rest, a(n)8 kg block slides 12 . 3 m down a frictionless ramp (inclined at 30 from the floor) to the bottom. The block then slides an additional 23...
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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