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Unformatted text preview: sanchez (es25396) – Homework #8  Conservation of energy and linear momentum – guevara – (130101) 1 This printout should have 20 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Does the KE of a car change more when it accelerates from 22 km / h to 32 km / h or when it accelerates from 32 km / h to 42 km / h? 1. No difference 2. From 32 km / h to 42 km / h 3. From 22 km / h to 32 km / h 4. More information is needed. 002 (part 1 of 4) 10.0 points A 6 kg block slides down a frictionless incline making an angle of 48 ◦ with the horizontal. The acceleration of gravity is 9 . 81 m / s 2 . a) Find the work done by the gravitational force when the block slides 1 . 5 m (measured along the incline). Answer in units of J. 003 (part 2 of 4) 10.0 points b) What is the total work done on the block? Answer in units of J. 004 (part 3 of 4) 10.0 points c) What is the speed of the block after it has moved 1 . 5 m if it starts from rest? Answer in units of m / s. 005 (part 4 of 4) 10.0 points d) What is its speed after 1 . 5 m if it starts with an initial speed of 1 . 5 m / s? Answer in units of m / s. 006 10.0 points A car and driver weighing 5840 N passes a sign stating “Bridge Out 30 . 4 m Ahead.” She slams on the brakes, and the car decelerates at a constant rate of 10 . 7 m...
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 Spring '09
 Guevara
 Conservation Of Energy, Energy, Force, Mass, Momentum, Work, General Relativity, Wnet

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