The Displacement D (In Meters) of an Object at Time $$d = - 1 \cos \left( \frac { \pi } { 2 } t \right)$$

question 87

Multiple Choice

The displacement d (in meters) of an object at time t (in seconds) is given. Describe the motion of the object. What is the
maximum displacement from its resting position, the time required for one oscillation, and the frequency?
- $$d = - 1 \cos \left( \frac { \pi } { 2 } t \right)$$

• A) simple harmonic; \(1 \mathrm {~m} ; \frac { 1 } { 4 }\) sec; 4 oscillations/sec
• B) simple harmonic; \(- 1 \mathrm {~m} ; 4 \mathrm { sec } ; \frac { 1 } { 4 }\) oscillation/sec
• C) simple harmonic; \(1 \mathrm {~m} ; 2 \mathrm { sec } ; \frac { 1 } { 2 }\) oscillation/sec
• D) simple harmonic; \(1 \mathrm {~m} ; 4 \mathrm { sec } ; \frac { 1 } { 4 }\) oscillation/sec

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