a) (8 points) Consider a mass of 2 kg on a frictionless horizontal plane, the mass is attached to a spring of spring constant k = 200 N/m and performing a simple harmonic motion. You are told that the maximum velocity of the mass is 20 m/s and that at t = 0 the velocity is -20 m/s. Assuming a solution of the kind in Equation (1) above, find A, w and oo for this harmonic motion.

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Chapter1: Units And Measurement
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The equation of motion for a simple harmonic oscillator (SHO) is:
= -kr
dt2
where m is the mass and k the spring constant. A generic solution of the above differential equation can
be written in the form:
x(t) = A cos(wt + ¢o).
(1)
Where w = Vk/m and A and øo are arbitrary constants to be determined by the initial conditions of
the motion.
a) (8 points) Consider a mass of 2 kg on a frictionless horizontal plane, the mass is attached to a spring
of spring constant k = 200 N/m and performing a simple harmonic motion. You are told that the
maximum velocity of the mass is 20 m/s and that at t = 0 the velocity is -20 m/s. Assuming a
solution of the kind in Equation (1) above, find A, w and o for this harmonic motion.
Transcribed Image Text:The equation of motion for a simple harmonic oscillator (SHO) is: = -kr dt2 where m is the mass and k the spring constant. A generic solution of the above differential equation can be written in the form: x(t) = A cos(wt + ¢o). (1) Where w = Vk/m and A and øo are arbitrary constants to be determined by the initial conditions of the motion. a) (8 points) Consider a mass of 2 kg on a frictionless horizontal plane, the mass is attached to a spring of spring constant k = 200 N/m and performing a simple harmonic motion. You are told that the maximum velocity of the mass is 20 m/s and that at t = 0 the velocity is -20 m/s. Assuming a solution of the kind in Equation (1) above, find A, w and o for this harmonic motion.
b) (3 points) Using your results from part a) write an expression for the velocity v(t) as a function of
time for the mass.
c) (3 points) Make a sketch of your function v(t) in part b) for any time t 2 0.
d) (2 points) Make a sketch of the kinetic energy of the mass for any t > 0.
e) (4 points) What can you say about the potential energy of the mass at time t = 0? Explain your
answer.
Transcribed Image Text:b) (3 points) Using your results from part a) write an expression for the velocity v(t) as a function of time for the mass. c) (3 points) Make a sketch of your function v(t) in part b) for any time t 2 0. d) (2 points) Make a sketch of the kinetic energy of the mass for any t > 0. e) (4 points) What can you say about the potential energy of the mass at time t = 0? Explain your answer.
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