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Unformatted text preview: markowitz (am45362) – Practice Questions for Final – distler – (56295) 1 This print-out should have 13 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The solution to Problem 11 makes it sound harder than it is. The key point, as empha- sized in class, is that the net force on the block, when it’s displaced a distance, y, from its equilibrium (floating) position is F = - k y, for some value of k. So the block oscillates, just as if it were attached to a spring ... 001 10.0 points A large wheel is coupled to a wheel with half the diameter as shown. r 2 r How does the rotational speed of the smaller wheel compare with that of the larger wheel? How do the tangential speeds at the rims compare (assuming the belt doesn’t slip)? 1. The smaller wheel has twice the rotational speed and the same tangential speed as the larger wheel. 2. The smaller wheel has half the rotational speed and half the tangential speed as the larger wheel. 3. The smaller wheel has four times the ro- tational speed and the same tangential speed as the larger wheel. 4. The smaller wheel has twice the rotational speed and twice the tangential speed as the larger wheel. 002 10.0 points A cannon fires a 0 . 371 kg shell with initial velocity v i = 9 . 6 m / s in the direction θ = 58 ◦ above the horizontal. Δ x Δ h 9 . 6 m / s 5 8 ◦ Δ y y The shell’s trajectory curves downward be- cause of gravity, so at the time t = 0 . 381 s the shell is below the straight line by some...
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- Fall '08
- Velocity, 1 g