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`        A 2 kg particle undergoes SHM acc. to x=1.5sin[ (pi)t/4 +(pi)/6 ]. Find the min.  time required to move from x=0.5m  to   x=-0.75?`
6 years ago

510 Points
```										let the particle is at x = +1.5   (extream position)
now time take by particle to reach x=.5 is t1
from extream position we use x = 1.5cos[ pit/4+pi/6]            (coz phase difference of pi/2)
.5 = 1.5cos[pit/4+pi/6]
pit/4 + pi/6 = cos-11/3
=7pi/18 (approx)
t/4 = 4pi/18
t1 = 16/18 sec .........1
now, let time taken by particle from extream position to  x=-.75 is t2 then
- .75 = 1.5cos[pit/4+pi/6]
pit/4+pi/6 = cos-1 -(1/2)
=2pi/3
t/4 = 1/2
t2 = 2sec    .......2
the difference t2 - t1 will give the time taken by particle from x=.5 to x=-.75
T = 2 - 16/18
=1.11sec approx
```
6 years ago
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