1.

A particle executes SHMof period 22 second and amplitude 10 cm. Find the distance it travels in 3.5 second starting from the point of zero displacement.

Answer»

Solution :Amplitude of the particle = 10 cm=0.01 m, Time
period `t=22s` and `phi_(0)=0`
The angular velocity `OMEGA=(2pi)/T=(2xx22)/(7xx22)=2/7` rad/s
The equation for displacement of the particle is
`x=Asin (omega t+phi)=0.10sin(2/7t)`
when `t=3.5s=7/2`s the distance it travels BECOMES equal to the displacement because the GIVES time is less than `T//4`.
`:. x=0.10sin(2/7xx7/2)=0.10sin(1)`
`=0.10sin (57^(@)17.) ( :. 1"radian"=57^(@)17.)`
`=0.10xx0.8414=0.8414m`


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