When a 020-Kg Block Is Suspended from a Vertically Hanging Spring, It

question 59

Multiple Choice

When a 0.20-kg block is suspended from a vertically hanging spring, it stretches the spring from its original length of 0.040 m to 0.045 m. The same block is attached to the same spring and placed on a horizontal, frictionless surface as shown. The block is then pulled so that the spring stretches to a total length of 0.15 m. The block is released at time t = 0 s and undergoes simple harmonic motion.
-Which one of the following expressions gives the displacement of the block as a function of time? Let x be in cm and t in seconds.

• A)x = 15 cos(14\(\pi\)t)
• B)x = 15 sin(14\(\pi\)t)
• C)x = 7 cos(15\(\pi\)t)
• D)x = 14 sin(15\(\pi\)t)
• E)x = 44 cos(14\(\pi\)t)

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