phys-6A-Final-W07

phys-6A-Final-W07 - Name: ID #: ; Signature: Physics 6A...

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Name : ; Signature : ID # : Physics 6A – Winter 2007 – Huang Final Exam 1. This is a closed book and closed note exam. Students are allowed to bring one page (could be double-sided) note of their own hand- writing. 2. This is a 180 minute exam. No student will be admitted 30 min- utes after the start of the exam. 3. This exam counts 50 points towards the ±nal grade. 1 2 3 4 5 6 7 8 9 10 TOTAL
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Problem 1 (5 points) A cannon barrel is elevated 45 0 above the horizontal. It fres a ball with an initial speed oF 300 m/s. a) What maximum height does the ball reach? b) What is the speed oF the ball at the maximum height? c) What is the acceleration oF the ball at the maximum height? d) How long is the ball in the air? e) What is the horizontal range oF the cannon ball? (Ignore any e±ects due to air resistance.)
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Problem 2 (5 points) A 60-kg block slides along the top of a 100-kg block. The 60-kg block has an acceleration of 3.0 m/s 2 while a horizontal force of 320 N is applied to it, as shown in the Figure. There is no friction between the 100-kg block and the horizontal smooth table surface, but there is friction between the two blocks. a) Find the coefficient of kinetic friction between the two blocks. b) Find the acceleration of the 100-kg block during the time that the 60-kg block remains in contact.
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Problem 3 (5 points) A pendulum is 0.8 m long and the bob has a mass of 1.00-kg. When
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phys-6A-Final-W07 - Name: ID #: ; Signature: Physics 6A...

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