Class 11 NEET Physics Oscillations Questions

y=sinωt−cosωt
√2[

1

√2

sinωt−

1

√2

cosωt]=√2sin(ωt−

π

2

)
It represents a SHM with time period,T=

2π

ω

.
y=sin2ωt=

1

4

[3sinωt−sin3ωt]
It represents a periodic motion with time period T=

2π

ω

but not SHM.

y=5cos(

3π

4

−3ωt)
=5cos(3ωt−

3π

4

)  [∵cos(−θ)=cosθ]
It represents a SHM with time period, T=

2π

3ω

.
y=1+ωt+ω2t2
It represents a non-periodic motion. Also it is not physically acceptable as the y→∞ as t→∞