HW2 Spring 2011

# At t0 the mass is at x 0 cm a write an expression for

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Unformatted text preview: =0. At t=0, the mass is at x= 0 cm. (a) Write an expression for the position x(t) of this mass as a function of time, giving numerical values for all constants. (b) For at least two periods of the motion, draw the following graphs, with each new graph below the previous one, using the same time scale in all of the graphs. Label the axes with numbers. (i) x vs t (position versus time). Physics 2214, Spring 2011 1 Cornell University (ii) (iii) (iv) (v) (vi) vx vs t (velocity versus time). ax vs t (acceleration versus time). K vs t (kinetic energy versus time). U vs t (spring potential energy versus time). Emech vs t (total mechanical energy = U + K versus time). 3. Ground motion in earthquakes. On January 12, 2009, a magnitude 7.0 earthquake struck Haiti near its capital Port-auPrince. Approximately 230,000 people died and 1,000,000 were made homeless. 250,000 residences and 30,000 commercial buildings collapsed or were severely damaged. Six weeks later on February 27, 2009 a magnitude 8.8...
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