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Unformatted text preview: EXAM #1 1. An elastic material is said to obey Hooke’s Law if―the stress is linearly proportional to the strain 2. In 1851, George Stokes derived an expression for the drag force exerted on spherical objects moving in a viscous fluid. The result, that the drag force is proportional to the speed of the object is valid for―small objects moving slowly in high viscosity fluids 3. The apparent weight of an object with mass M and density ρ that is completely immersed in a fluid is―less than Mg because the buoyant force and the weight force are in opposite directions 4. Wafer=square root of whatever numerical value they give you 5. Harmonic motion=1/f 6. Ear drum, simple harmonic: K=4Π 2 f 2 m 7. Consider a particle whose velocity as a function of time is described by the graph on the right. At point P on the graph the particle is ―slowing down 8. The acceleration of an object is always in the direction of―the net force 9. Which of the following is NOT a vector quantity? ―mass 10. An e.coli bacterium is falling through a viscous medium under the downward pull of gravity. If the velocity of the bacterium is constant, then the net force on the bacterium is―zero 11. A material with a large bulk modulus―is relatively difficult to compress EXAM #2 1. Particle A with mass in moving with a speed of 1cm/s. particle B has half the mass and is moving with a speed of 2cm/s. particle B has half the mass and is moving with a speed of 2cm/s....
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